Comparison results

DS420+ DS1520+ DS218play DS220j
Hardware Specs
Hardware Specifications
CPU
CPU Model Intel Celeron J4025 Intel Celeron J4125 Realtek RTD1296 Realtek RTD1296
CPU Quantity 1 1 1 1
CPU Architecture 64-bit 64-bit 64-bit 64-bit
CPU Frequency 2-core 2.0 (base) / 2.9 (burst) GHz 4-core 2.0 (base) / 2.7 (burst) GHz 4-core 1.4 GHz 4-core 1.4 GHz
Hardware Encryption Engine
Hardware Encryption Engine (AES-NI)
Memory
System Memory 2 GB DDR4 non-ECC 8 GB DDR4 non-ECC SODIMM 1 GB DDR4 non-ECC 512 MB DDR4 non-ECC
Memory Module Pre-installed 8 GB (4 GB + 4 GB)
Total Memory Slots 1 1
Maximum Memory Capacity 6 GB (2 GB + 4 GB)
Notes
  • Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance.
  • Please select Synology memory modules for optimum compatibility and reliability. Synology will not provide complete product warranty or technical support if non-Synology memory modules are used for memory expansion.
Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance. Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance. Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance.
Storage
Drive Bays 4 5 2 2
Maximum Drive Bays with Expansion Unit 15 (DX517 x 2)
M.2 Drive Slots 2 (NVMe) 2 (NVMe)
Compatible Drive Type* (See all supported drives)
  • 3.5" SATA HDD
  • 2.5" SATA HDD
  • 2.5" SATA SSD
  • M.2 2280 NVMe SSD
  • 3.5" SATA HDD
  • 2.5" SATA HDD
  • 2.5" SATA SSD
  • M.2 2280 NVMe SSD
  • 3.5" SATA HDD
  • 2.5" SATA HDD (with optional 2.5" Disk Holder)
  • 2.5" SATA SSD (with optional 2.5" Disk Holder)
  • 3.5" SATA HDD
  • 2.5" SATA HDD (with optional 2.5" Disk Holder)
  • 2.5" SATA SSD (with optional 2.5" Disk Holder)
Hot Swappable Drive
Notes "Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay. "Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay. "Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay. "Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay.
External Ports
RJ-45 1GbE LAN Port 2 (with Link Aggregation / Failover support) 4 (with Link Aggregation / Failover support) 1 1
USB 3.2 Gen 1 Port* 2 2 2 2
eSATA Port 2
Notes The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019. The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019. The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019. The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019.
File System
Internal Drives
  • Btrfs
  • EXT4
  • Btrfs
  • EXT4
  • EXT4
  • EXT4
External Drives
  • Btrfs
  • EXT4
  • EXT3
  • FAT
  • NTFS
  • HFS+
  • exFAT
  • Btrfs
  • EXT4
  • EXT3
  • FAT
  • NTFS
  • HFS+
  • exFAT
  • EXT4
  • EXT3
  • FAT
  • NTFS
  • HFS+
  • exFAT
  • EXT4
  • EXT3
  • FAT
  • NTFS
  • HFS+
  • exFAT
Notes exFAT Access can be installed for free from Package Center in DSM 7.0. In DSM 6.2 or earlier versions, exFAT Access needs to be purchased in Package Center. exFAT Access can be installed for free from Package Center in DSM 7.0. In DSM 6.2 or earlier versions, exFAT Access needs to be purchased in Package Center. exFAT Access can be installed for free from Package Center in DSM 7.0. In DSM 6.2 or earlier versions, exFAT Access needs to be purchased in Package Center. exFAT Access can be installed for free from Package Center in DSM 7.0. In DSM 6.2 or earlier versions, exFAT Access needs to be purchased in Package Center.
Appearance
Size (Height x Width x Depth) 166 mm x 199 mm x 223 mm 166 mm x 230 mm x 223 mm 165 mm x 100 mm x 225.5 mm 165 mm x 100 mm x 225.5 mm
Weight 2.18 kg 2.62 kg 0.87 kg 0.88 kg
Others
System Fan 92 mm x 92 mm x 2 pcs 92 mm x 92 mm x 2 pcs 92 mm x 92 mm x 1 pcs 92 mm x 92 mm x 1 pcs
Fan Speed Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
  • Low-power Mode
Brightness Adjustable Front LED Indicators
Power Recovery
Noise Level* 19.8 dB(A) 20.8 dB(A) 19.9 dB(A) 18.2 dB(A)
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter 90 W 120 W 60 W 60 W
AC Input Power Voltage 100V to 240V AC 100V to 240V AC 100V to 240V AC 100V to 240V AC
Power Frequency 50/60 Hz, Single Phase 50/60 Hz, Single Phase 50/60 Hz, Single Phase 50/60 Hz, Single Phase
Power Consumption* 28.30 W (Access)
8.45 W (HDD Hibernation)
36.67 W (Access)
15.51 W (HDD Hibernation)
16.79 W (Access)
5.16 W (HDD Hibernation)
12.46 W (Access)
5.06 W (HDD Hibernation)
British Thermal Unit 96.5 BTU/hr (Access)
28.81 BTU/hr (HDD Hibernation)
125.21 BTU/hr (Access)
52.96 BTU/hr (HDD Hibernation)
57.29 BTU/hr (Access)
17.61 BTU/hr (HDD Hibernation)
45.52 BTU/hr (Access)
17.27 BTU/hr (HDD Hibernation)
Notes
  • Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
  • Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%
  • Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
  • Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%
Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%
  • Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
  • Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%
Temperature
Operating Temperature 0°C to 40°C (32°F to 104°F) 0°C to 40°C (32°F to 104°F) 5°C to 40°C (40°F to 104°F) 0°C to 40°C (32°F to 104°F)
Storage Temperature -20°C to 60°C (-5°F to 140°F) -20°C to 60°C (-5°F to 140°F) -20°C to 60°C (-5°F to 140°F) -20°C to 60°C (-5°F to 140°F)
Relative Humidity 5% to 95% RH 5% to 95% RH 5% to 95% RH 5% to 95% RH
Certification
  • FCC
  • CE
  • BSMI
  • EAC
  • CCC
  • KC
  • VCCI
  • RCM
  • FCC
  • CE
  • BSMI
  • EAC
  • CCC
  • KC
  • VCCI
  • RCM
  • FCC
  • CE
  • BSMI
  • EAC
  • CCC
  • KC
  • RCM
  • EAC
  • CCC
  • KC
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
Warranty 3 Years 3 Years 2 Years 2 Years
Notes The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment RoHS Compliant RoHS Compliant RoHS Compliant RoHS Compliant
Packaging Content
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Adapter X 1
  • AC Power Cord X 1
  • RJ-45 LAN Cable X 2
  • Quick Installation Guide X 1
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Adapter X 1
  • AC Power Cord X 1
  • RJ-45 LAN Cable X 2
  • Quick Installation Guide X 1
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Adapter X 1
  • AC Power Cord X 1
  • RJ-45 LAN Cable X 1
  • Quick Installation Guide X 1
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Adapter X 1
  • AC Power Cord X 1
  • RJ-45 LAN Cable X 1
  • Quick Installation Guide X 1
Optional Accessories
  • VisualStation: VS360HD
  • Surveillance Device License Pack
  • Disk Holder: Type C
  • VisualStation: VS360HD
  • Surveillance Device License Pack
  • Disk Holder: Type C
Notes All memory modules will operate at the maximum frequency specified by the CPU manufacturer.
Software Specs
DSM Specifications
Storage Management
Maximum Single Volume Size* 108 TB 108 TB 108 TB 108 TB
Maximum Internal Volume Number 64 64 64 64
SSD Read / Write Cache (White Paper)
SSD TRIM
Supported RAID Type
  • Synology Hybrid RAID
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • Synology Hybrid RAID
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • Synology Hybrid RAID
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • Synology Hybrid RAID
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
RAID Migration
  • Basic to RAID 1
  • Basic to RAID 5
  • RAID 1 to RAID 5
  • RAID 5 to RAID 6
  • Basic to RAID 1
  • Basic to RAID 5
  • RAID 1 to RAID 5
  • RAID 5 to RAID 6
Basic to RAID 1 Basic to RAID 1
Volume Expansion with Larger HDDs
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • Synology Hybrid RAID
  • RAID 1
  • Synology Hybrid RAID
  • RAID 1
Volume Expansion by Adding a HDD
  • Synology Hybrid RAID
  • JBOD
  • RAID 5
  • Synology Hybrid RAID
  • JBOD
  • RAID 5
  • RAID 6
Synology Hybrid RAID Synology Hybrid RAID
Global Hot Spare Supported RAID Type
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Notes
  • Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and the amount of system metadata stored.
  • Actual maximum storage pool and volume sizes vary depending on drives used, the number of drive bays available, and the RAID configuration.
  • Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and the amount of system metadata stored.
  • Each internal volume (may consist of multiple drives) is expandable up to 108TB.
  • Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and the amount of system metadata stored.
  • Actual maximum storage pool and volume sizes vary depending on drives used, the number of drive bays available, and the RAID configuration.
  • Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and the amount of system metadata stored.
  • Actual maximum storage pool and volume sizes vary depending on drives used, the number of drive bays available, and the RAID configuration.
File Services
File Protocol SMB/AFP/NFS/FTP/WebDAV SMB/AFP/NFS/FTP/WebDAV SMB/AFP/NFS/FTP/WebDAV SMB/AFP/NFS/FTP/WebDAV
Maximum Concurrent SMB/AFP/FTP Connections 500 2,000 200 100
Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion) 1,500
Windows Access Control List (ACL) Integration
NFS Kerberos Authentication
Notes
  • Regarding data concerning tests with RAM expansion, all memory slots are installed with the maximum capacity of supported RAM.
  • The testing standard was based on the maximum number of concurrent connections supported by this model. During the testing, 25% of the connections were used to transfer files concurrently. The transfer process guaranteed that the connections were not interrupted; the minimum transfer speed was not guaranteed.
The testing standard was based on the maximum number of concurrent connections supported by this model. During the testing, 25% of the connections were used to transfer files concurrently. The transfer process guaranteed that the connections were not interrupted; the minimum transfer speed was not guaranteed. The testing standard was based on the maximum number of concurrent connections supported by this model. During the testing, 25% of the connections were used to transfer files concurrently. The transfer process guaranteed that the connections were not interrupted; the minimum transfer speed was not guaranteed. The testing standard was based on the maximum number of concurrent connections supported by this model. During the testing, 25% of the connections were used to transfer files concurrently. The transfer process guaranteed that the connections were not interrupted; the minimum transfer speed was not guaranteed.
Account & Shared Folder
Maximum Local User Accounts 2,048 2,048 2,048 1,024
Maximum Local Groups 256 256 256 256
Maximum Shared Folder 512 512 256 256
Maximum Shared Folder Sync Tasks 8 32 4 2
Hybrid Share
Hybrid Share Folder Number 10 10
Notes For more supported details, please check this article. For more supported details, please check this article.
High Availability
Synology High Availability
Log Center
Syslog Events per Second 800 800 400 200
Virtualization
VMware vSphere with VAAI
Windows Server 2016
Windows Server 2019
Citrix Ready
OpenStack
General Specifications
Networking Protocols SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers
  • Google Chrome
  • Firefox
  • Microsoft Edge
  • Safari
  • Google Chrome
  • Firefox
  • Microsoft Edge
  • Safari
  • Google Chrome
  • Firefox
  • Microsoft Edge
  • Safari
  • Google Chrome
  • Firefox
  • Microsoft Edge
  • Safari
Supported Language English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český, ภาษาไทย, 日本語, 한국어, 繁體中文, 简体中文 English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český, ภาษาไทย, 日本語, 한국어, 繁體中文, 简体中文 English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český, ภาษาไทย, 日本語, 한국어, 繁體中文, 简体中文 English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český, ภาษาไทย, 日本語, 한국어, 繁體中文, 简体中文
Notes For an updated list of supported browser versions, check the DSM Technical Specifications. For an updated list of supported browser versions, check the DSM Technical Specifications. For an updated list of supported browser versions, check the DSM Technical Specifications. For an updated list of supported browser versions, check the DSM Technical Specifications.
Add-on Packages view the complete package list
Antivirus by McAfee (Trial)
Central Management System
Synology Chat
Maximum Users 1,000 1,500 500 10
Maximum Number of Concurrent Users 50 100
Notes When applicable, tested systems are configured with maximum memory and set to allow the maximum number of connections. When applicable, tested systems are configured with maximum memory and set to allow the maximum number of connections. When applicable, tested systems are configured with maximum memory and set to allow the maximum number of connections. When applicable, tested systems are configured with maximum memory and set to allow the maximum number of connections.
Document Viewer
Download Station
Maximum Concurrent Download Tasks 80 80 80 50
SAN Manager
Maximum iSCSI Target Number 128 128 10 10
Maximum LUN 256 256 10 10
LUN Clone/Snapshot, Windows ODX
Notes iSCSI Manager has been renamed to SAN Manager in DSM 7.0. iSCSI Manager has been renamed to SAN Manager in DSM 7.0. iSCSI Manager has been renamed to SAN Manager in DSM 7.0. iSCSI Manager has been renamed to SAN Manager in DSM 7.0.
Synology MailPlus / MailPlus Server
Free Email Accounts 5 (Licenses required for additional accounts) 5 (Licenses required for additional accounts)
Maximum Number of Concurrent Users 50 100
Maximum Server Performance 936,000 emails per day, approx. 28GB 1,224,000 emails per day, approx. 37GB
Notes
  • Models with more than 4 bays were installed with two SSDs for SSD cache.
  • For tested models with expandable memory, the maximum amount of RAM was installed.
  • The performance of the mail system will slightly decrease in high-availability mode due to data synchronization between the two servers.
  • Functions that were enabled in all of the tests above: anti-spam, anti-virus, DNSBL, greylist, content scan, full-text search (English only).
  • Models with more than 4 bays were installed with two SSDs for SSD cache.
  • For tested models with expandable memory, the maximum amount of RAM was installed.
  • The performance of the mail system will slightly decrease in high-availability mode due to data synchronization between the two servers.
  • Functions that were enabled in all of the tests above: anti-spam, anti-virus, DNSBL, greylist, content scan, full-text search (English only).
Media Server
DLNA Compliance
Synology Photos
Facial Recognition
Notes Photo Station and Synology Moments are succeeded by Synology Photos in DSM 7.0. For a features comparison, check this article. Photo Station and Synology Moments are succeeded by Synology Photos in DSM 7.0. For a features comparison, check this article. Photo Station and Synology Moments are succeeded by Synology Photos in DSM 7.0. For a features comparison, check this article. Photo Station and Synology Moments are succeeded by Synology Photos in DSM 7.0. For a features comparison, check this article.
Snapshot Replication
Maximum Snapshots per Shared Folder 1,024 1,024
Maximum of System Snapshots 65,536 65,536
Surveillance Station
Maximum IP cam (Licenses required) 25 (including 2 Free License) (see all supported IP cameras) 40 (including 2 Free License) (see all supported IP cameras) 15 (including 2 Free License) (see all supported IP cameras) 12 (including 2 Free License) (see all supported IP cameras)
Total FPS (H.264) 750 FPS @ 720p (1280x720)
700 FPS @ 1080p (1920x1080)
350 FPS @ 3M (2048x1536)
240 FPS @ 5M (2591x1944)
120 FPS @ 4K (3840x2160)
1200 FPS @ 720p (1280x720)
1050 FPS @ 1080p (1920x1080)
600 FPS @ 3M (2048x1536)
360 FPS @ 5M (2591x1944)
200 FPS @ 4K (3840x2160)
450 FPS @ 720p (1280x720)
180 FPS @ 1080p (1920x1080)
110 FPS @ 3M (2048x1536)
80 FPS @ 5M (2591x1944)
40 FPS @ 4K (3840x2160)
360 FPS @ 720p (1280x720)
110 FPS @ 1080p (1920x1080)
70 FPS @ 3M (2048x1536)
40 FPS @ 5M (2591x1944)
30 FPS @ 4K (3840x2160)
Total FPS (H.265) 750 FPS @ 720p (1280x720)
750 FPS @ 1080p (1920x1080)
500 FPS @ 3M (2048x1536)
250 FPS @ 5M (2591x1944)
200 FPS @ 4K (3840x2160)
1200 FPS @ 720p (1280x720)
1200 FPS @ 1080p (1920x1080)
1000 FPS @ 3M (2048x1536)
600 FPS @ 5M (2591x1944)
300 FPS @ 4K (3840x2160)
450 FPS @ 720p (1280x720)
450 FPS @ 1080p (1920x1080)
210 FPS @ 3M (2048x1536)
120 FPS @ 5M (2591x1944)
60 FPS @ 4K (3840x2160)
360 FPS @ 720p (1280x720)
240 FPS @ 1080p (1920x1080)
110 FPS @ 3M (2048x1536)
70 FPS @ 5M (2591x1944)
40 FPS @ 4K (3840x2160)
Total FPS (MJPEG) 450 FPS @ 720p (1280x720)
250 FPS @ 1080p (1920x1080)
160 FPS @ 3M (2048x1536)
130 FPS @ 5M (2591x1944)
680 FPS @ 720p (1280x720)
400 FPS @ 1080p (1920x1080)
300 FPS @ 3M (2048x1536)
200 FPS @ 5M (2591x1944)
210 FPS @ 720p (1280x720)
70 FPS @ 1080p (1920x1080)
50 FPS @ 3M (2048x1536)
30 FPS @ 5M (2591x1944)
80 FPS @ 720p (1280x720)
50 FPS @ 1080p (1920x1080)
40 FPS @ 3M (2048x1536)
20 FPS @ 5M (2591x1944)
Notes
  • Maximum IP cameras and FPS figures are tested with the device fully populated with drives and under a continuous recording setup.
  • Actual system capabilities may differ depending on system configuration, drive performance, number of features enabled, and if additional workloads are present.
  • Maximum IP cameras and FPS figures are tested with the device fully populated with drives and under a continuous recording setup.
  • Actual system capabilities may differ depending on system configuration, drive performance, number of features enabled, and if additional workloads are present.
  • Maximum IP cameras and FPS figures are tested with the device fully populated with drives and under a continuous recording setup.
  • Actual system capabilities may differ depending on system configuration, drive performance, number of features enabled, and if additional workloads are present.
  • Maximum IP cameras and FPS figures are tested with the device fully populated with drives and under a continuous recording setup.
  • Actual system capabilities may differ depending on system configuration, drive performance, number of features enabled, and if additional workloads are present.
Synology Drive
Recommended Number of Concurrent Sync Clients 350 (the number of connections that can be maintained when the recommended number of hosted files was reached) 350 (the number of connections that can be maintained when the recommended number of hosted files was reached) 200 (the number of connections that can be maintained when the recommended number of hosted files was reached) 200 (the number of connections that can be maintained when the recommended number of hosted files was reached)
Recommended Number of Hosted Files 5,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above) 5,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above) 500,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above) 500,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
Notes
  • Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
  • Utilizing SSD cache can significantly improve performance.
  • For tested models with expandable memory, the maximum amount of RAM was installed.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
  • Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
  • Utilizing SSD cache can significantly improve performance.
  • For tested models with expandable memory, the maximum amount of RAM was installed.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
  • Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
  • EXT4 file system and non-encrypted shared folders were used during the aforementioned testing.
  • Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
  • EXT4 file system and non-encrypted shared folders were used during the aforementioned testing.
Synology Office
Maximum Users 600 1,200 200 200
Notes
  • Multiple files were opened for testing and each file was edited by 30 users simultaneously.
  • For tested models with expandable memory, the maximum amount of RAM was installed.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
  • Multiple files were opened for testing and each file was edited by 30 users simultaneously.
  • For tested models with expandable memory, the maximum amount of RAM was installed.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
  • Multiple files were opened for testing and each file was edited by 30 users simultaneously.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
  • Multiple files were opened for testing and each file was edited by 30 users simultaneously.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
Video Station
Virtual Machine Manager
Recommended Virtual Machine Instances 2 (Learn more) 4 (Learn more)
Recommended Virtual DSM Number (Licenses required) 2 (including 1 Free License) 4 (including 1 Free License)
Notes The specifications vary depending on system configuration and memory size. The specifications vary depending on system configuration and memory size.
VPN Server
Maximum Connections 40 40 20 10
Hardware Specs
Hardware Specifications
CPU
CPU Model
DS420+ Intel Celeron J4025
DS1520+ Intel Celeron J4125
DS218play Realtek RTD1296
DS220j Realtek RTD1296
CPU Quantity
DS420+ 1
DS1520+ 1
DS218play 1
DS220j 1
CPU Architecture
DS420+ 64-bit
DS1520+ 64-bit
DS218play 64-bit
DS220j 64-bit
CPU Frequency
DS420+ 2-core 2.0 (base) / 2.9 (burst) GHz
DS1520+ 4-core 2.0 (base) / 2.7 (burst) GHz
DS218play 4-core 1.4 GHz
DS220j 4-core 1.4 GHz
Hardware Encryption Engine
DS420+
DS1520+
DS218play
DS220j
Hardware Encryption Engine (AES-NI)
DS420+
DS1520+
DS218play
DS220j
Memory
System Memory
DS420+ 2 GB DDR4 non-ECC
DS1520+ 8 GB DDR4 non-ECC SODIMM
DS218play 1 GB DDR4 non-ECC
DS220j 512 MB DDR4 non-ECC
Memory Module Pre-installed
DS420+
DS1520+ 8 GB (4 GB + 4 GB)
DS218play
DS220j
Total Memory Slots
DS420+ 1
DS1520+ 1
DS218play
DS220j
Maximum Memory Capacity
DS420+ 6 GB (2 GB + 4 GB)
DS1520+
DS218play
DS220j
Notes
DS420+
  • Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance.
  • Please select Synology memory modules for optimum compatibility and reliability. Synology will not provide complete product warranty or technical support if non-Synology memory modules are used for memory expansion.
DS1520+ Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance.
DS218play Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance.
DS220j Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance.
Storage
Drive Bays
DS420+ 4
DS1520+ 5
DS218play 2
DS220j 2
Maximum Drive Bays with Expansion Unit
DS420+
DS1520+ 15 (DX517 x 2)
DS218play
DS220j
M.2 Drive Slots
DS420+ 2 (NVMe)
DS1520+ 2 (NVMe)
DS218play
DS220j
Compatible Drive Type* (See all supported drives)
DS420+
  • 3.5" SATA HDD
  • 2.5" SATA HDD
  • 2.5" SATA SSD
  • M.2 2280 NVMe SSD
DS1520+
  • 3.5" SATA HDD
  • 2.5" SATA HDD
  • 2.5" SATA SSD
  • M.2 2280 NVMe SSD
DS218play
  • 3.5" SATA HDD
  • 2.5" SATA HDD (with optional 2.5" Disk Holder)
  • 2.5" SATA SSD (with optional 2.5" Disk Holder)
DS220j
  • 3.5" SATA HDD
  • 2.5" SATA HDD (with optional 2.5" Disk Holder)
  • 2.5" SATA SSD (with optional 2.5" Disk Holder)
Hot Swappable Drive
DS420+
DS1520+
DS218play
DS220j
Notes
DS420+ "Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay.
DS1520+ "Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay.
DS218play "Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay.
DS220j "Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay.
External Ports
RJ-45 1GbE LAN Port
DS420+ 2 (with Link Aggregation / Failover support)
DS1520+ 4 (with Link Aggregation / Failover support)
DS218play 1
DS220j 1
USB 3.2 Gen 1 Port*
DS420+ 2
DS1520+ 2
DS218play 2
DS220j 2
eSATA Port
DS420+
DS1520+ 2
DS218play
DS220j
Notes
DS420+ The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019.
DS1520+ The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019.
DS218play The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019.
DS220j The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019.
File System
Internal Drives
DS420+
  • Btrfs
  • EXT4
DS1520+
  • Btrfs
  • EXT4
DS218play
  • EXT4
DS220j
  • EXT4
External Drives
DS420+
  • Btrfs
  • EXT4
  • EXT3
  • FAT
  • NTFS
  • HFS+
  • exFAT
DS1520+
  • Btrfs
  • EXT4
  • EXT3
  • FAT
  • NTFS
  • HFS+
  • exFAT
DS218play
  • EXT4
  • EXT3
  • FAT
  • NTFS
  • HFS+
  • exFAT
DS220j
  • EXT4
  • EXT3
  • FAT
  • NTFS
  • HFS+
  • exFAT
Notes
DS420+ exFAT Access can be installed for free from Package Center in DSM 7.0. In DSM 6.2 or earlier versions, exFAT Access needs to be purchased in Package Center.
DS1520+ exFAT Access can be installed for free from Package Center in DSM 7.0. In DSM 6.2 or earlier versions, exFAT Access needs to be purchased in Package Center.
DS218play exFAT Access can be installed for free from Package Center in DSM 7.0. In DSM 6.2 or earlier versions, exFAT Access needs to be purchased in Package Center.
DS220j exFAT Access can be installed for free from Package Center in DSM 7.0. In DSM 6.2 or earlier versions, exFAT Access needs to be purchased in Package Center.
Appearance
Size (Height x Width x Depth)
DS420+ 166 mm x 199 mm x 223 mm
DS1520+ 166 mm x 230 mm x 223 mm
DS218play 165 mm x 100 mm x 225.5 mm
DS220j 165 mm x 100 mm x 225.5 mm
Weight
DS420+ 2.18 kg
DS1520+ 2.62 kg
DS218play 0.87 kg
DS220j 0.88 kg
Others
System Fan
DS420+ 92 mm x 92 mm x 2 pcs
DS1520+ 92 mm x 92 mm x 2 pcs
DS218play 92 mm x 92 mm x 1 pcs
DS220j 92 mm x 92 mm x 1 pcs
Fan Speed Mode
DS420+
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
DS1520+
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
DS218play
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
DS220j
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
  • Low-power Mode
Brightness Adjustable Front LED Indicators
DS420+
DS1520+
DS218play
DS220j
Power Recovery
DS420+
DS1520+
DS218play
DS220j
Noise Level*
DS420+ 19.8 dB(A)
DS1520+ 20.8 dB(A)
DS218play 19.9 dB(A)
DS220j 18.2 dB(A)
Scheduled Power On / Off
DS420+
DS1520+
DS218play
DS220j
Wake on LAN / WAN
DS420+
DS1520+
DS218play
DS220j
Power Supply Unit / Adapter
DS420+ 90 W
DS1520+ 120 W
DS218play 60 W
DS220j 60 W
AC Input Power Voltage
DS420+ 100V to 240V AC
DS1520+ 100V to 240V AC
DS218play 100V to 240V AC
DS220j 100V to 240V AC
Power Frequency
DS420+ 50/60 Hz, Single Phase
DS1520+ 50/60 Hz, Single Phase
DS218play 50/60 Hz, Single Phase
DS220j 50/60 Hz, Single Phase
Power Consumption*
DS420+ 28.30 W (Access)
8.45 W (HDD Hibernation)
DS1520+ 36.67 W (Access)
15.51 W (HDD Hibernation)
DS218play 16.79 W (Access)
5.16 W (HDD Hibernation)
DS220j 12.46 W (Access)
5.06 W (HDD Hibernation)
British Thermal Unit
DS420+ 96.5 BTU/hr (Access)
28.81 BTU/hr (HDD Hibernation)
DS1520+ 125.21 BTU/hr (Access)
52.96 BTU/hr (HDD Hibernation)
DS218play 57.29 BTU/hr (Access)
17.61 BTU/hr (HDD Hibernation)
DS220j 45.52 BTU/hr (Access)
17.27 BTU/hr (HDD Hibernation)
Notes
DS420+
  • Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
  • Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%
DS1520+
  • Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
  • Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%
DS218play Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%
DS220j
  • Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
  • Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%
Temperature
Operating Temperature
DS420+ 0°C to 40°C (32°F to 104°F)
DS1520+ 0°C to 40°C (32°F to 104°F)
DS218play 5°C to 40°C (40°F to 104°F)
DS220j 0°C to 40°C (32°F to 104°F)
Storage Temperature
DS420+ -20°C to 60°C (-5°F to 140°F)
DS1520+ -20°C to 60°C (-5°F to 140°F)
DS218play -20°C to 60°C (-5°F to 140°F)
DS220j -20°C to 60°C (-5°F to 140°F)
Relative Humidity
DS420+ 5% to 95% RH
DS1520+ 5% to 95% RH
DS218play 5% to 95% RH
DS220j 5% to 95% RH
Certification
DS420+
  • FCC
  • CE
  • BSMI
  • EAC
  • CCC
  • KC
  • VCCI
  • RCM
DS1520+
  • FCC
  • CE
  • BSMI
  • EAC
  • CCC
  • KC
  • VCCI
  • RCM
DS218play
  • FCC
  • CE
  • BSMI
  • EAC
  • CCC
  • KC
  • RCM
DS220j
  • EAC
  • CCC
  • KC
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
Warranty
DS420+ 3 Years
DS1520+ 3 Years
DS218play 2 Years
DS220j 2 Years
Notes
DS420+ The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
DS1520+ The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
DS218play The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
DS220j The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment
DS420+ RoHS Compliant
DS1520+ RoHS Compliant
DS218play RoHS Compliant
DS220j RoHS Compliant
Packaging Content
DS420+
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Adapter X 1
  • AC Power Cord X 1
  • RJ-45 LAN Cable X 2
  • Quick Installation Guide X 1
DS1520+
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Adapter X 1
  • AC Power Cord X 1
  • RJ-45 LAN Cable X 2
  • Quick Installation Guide X 1
DS218play
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Adapter X 1
  • AC Power Cord X 1
  • RJ-45 LAN Cable X 1
  • Quick Installation Guide X 1
DS220j
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Adapter X 1
  • AC Power Cord X 1
  • RJ-45 LAN Cable X 1
  • Quick Installation Guide X 1
Optional Accessories
DS420+
DS1520+
DS218play
  • VisualStation: VS360HD
  • Surveillance Device License Pack
  • Disk Holder: Type C
DS220j
  • VisualStation: VS360HD
  • Surveillance Device License Pack
  • Disk Holder: Type C
Notes
DS420+ All memory modules will operate at the maximum frequency specified by the CPU manufacturer.
DS1520+
DS218play
DS220j
Software Specs
DSM Specifications
Maximum Single Volume Size*
DS420+ 108 TB
DS1520+ 108 TB
DS218play 108 TB
DS220j 108 TB
Maximum Internal Volume Number
DS420+ 64
DS1520+ 64
DS218play 64
DS220j 64
SSD Read / Write Cache (White Paper)
DS420+
DS1520+
DS218play
DS220j
SSD TRIM
DS420+
DS1520+
DS218play
DS220j
Supported RAID Type
DS420+
  • Synology Hybrid RAID
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
DS1520+
  • Synology Hybrid RAID
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
DS218play
  • Synology Hybrid RAID
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
DS220j
  • Synology Hybrid RAID
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
RAID Migration
DS420+
  • Basic to RAID 1
  • Basic to RAID 5
  • RAID 1 to RAID 5
  • RAID 5 to RAID 6
DS1520+
  • Basic to RAID 1
  • Basic to RAID 5
  • RAID 1 to RAID 5
  • RAID 5 to RAID 6
DS218play Basic to RAID 1
DS220j Basic to RAID 1
Volume Expansion with Larger HDDs
DS420+
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
DS1520+
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
DS218play
  • Synology Hybrid RAID
  • RAID 1
DS220j
  • Synology Hybrid RAID
  • RAID 1
Volume Expansion by Adding a HDD
DS420+
  • Synology Hybrid RAID
  • JBOD
  • RAID 5
DS1520+
  • Synology Hybrid RAID
  • JBOD
  • RAID 5
  • RAID 6
DS218play Synology Hybrid RAID
DS220j Synology Hybrid RAID
Global Hot Spare Supported RAID Type
DS420+
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
DS1520+
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
DS218play
DS220j
Notes
DS420+
  • Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and the amount of system metadata stored.
  • Actual maximum storage pool and volume sizes vary depending on drives used, the number of drive bays available, and the RAID configuration.
DS1520+
  • Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and the amount of system metadata stored.
  • Each internal volume (may consist of multiple drives) is expandable up to 108TB.
DS218play
  • Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and the amount of system metadata stored.
  • Actual maximum storage pool and volume sizes vary depending on drives used, the number of drive bays available, and the RAID configuration.
DS220j
  • Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and the amount of system metadata stored.
  • Actual maximum storage pool and volume sizes vary depending on drives used, the number of drive bays available, and the RAID configuration.
File Protocol
DS420+ SMB/AFP/NFS/FTP/WebDAV
DS1520+ SMB/AFP/NFS/FTP/WebDAV
DS218play SMB/AFP/NFS/FTP/WebDAV
DS220j SMB/AFP/NFS/FTP/WebDAV
Maximum Concurrent SMB/AFP/FTP Connections
DS420+ 500
DS1520+ 2,000
DS218play 200
DS220j 100
Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion)
DS420+ 1,500
DS1520+
DS218play
DS220j
Windows Access Control List (ACL) Integration
DS420+
DS1520+
DS218play
DS220j
NFS Kerberos Authentication
DS420+
DS1520+
DS218play
DS220j
Notes
DS420+
  • Regarding data concerning tests with RAM expansion, all memory slots are installed with the maximum capacity of supported RAM.
  • The testing standard was based on the maximum number of concurrent connections supported by this model. During the testing, 25% of the connections were used to transfer files concurrently. The transfer process guaranteed that the connections were not interrupted; the minimum transfer speed was not guaranteed.
DS1520+ The testing standard was based on the maximum number of concurrent connections supported by this model. During the testing, 25% of the connections were used to transfer files concurrently. The transfer process guaranteed that the connections were not interrupted; the minimum transfer speed was not guaranteed.
DS218play The testing standard was based on the maximum number of concurrent connections supported by this model. During the testing, 25% of the connections were used to transfer files concurrently. The transfer process guaranteed that the connections were not interrupted; the minimum transfer speed was not guaranteed.
DS220j The testing standard was based on the maximum number of concurrent connections supported by this model. During the testing, 25% of the connections were used to transfer files concurrently. The transfer process guaranteed that the connections were not interrupted; the minimum transfer speed was not guaranteed.
Maximum Local User Accounts
DS420+ 2,048
DS1520+ 2,048
DS218play 2,048
DS220j 1,024
Maximum Local Groups
DS420+ 256
DS1520+ 256
DS218play 256
DS220j 256
Maximum Shared Folder
DS420+ 512
DS1520+ 512
DS218play 256
DS220j 256
Maximum Shared Folder Sync Tasks
DS420+ 8
DS1520+ 32
DS218play 4
DS220j 2
Hybrid Share Folder Number
DS420+ 10
DS1520+ 10
DS218play
DS220j
Notes
DS420+ For more supported details, please check this article.
DS1520+ For more supported details, please check this article.
DS218play
DS220j
Synology High Availability
DS420+
DS1520+
DS218play
DS220j
DS420+
DS1520+
DS218play
DS220j
Syslog Events per Second
DS420+ 800
DS1520+ 800
DS218play 400
DS220j 200
Virtualization
VMware vSphere with VAAI
DS420+
DS1520+
DS218play
DS220j
Windows Server 2016
DS420+
DS1520+
DS218play
DS220j
Windows Server 2019
DS420+
DS1520+
DS218play
DS220j
Citrix Ready
DS420+
DS1520+
DS218play
DS220j
OpenStack
DS420+
DS1520+
DS218play
DS220j
Networking Protocols
DS420+ SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
DS1520+ SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
DS218play SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
DS220j SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers
DS420+
  • Google Chrome
  • Firefox
  • Microsoft Edge
  • Safari
DS1520+
  • Google Chrome
  • Firefox
  • Microsoft Edge
  • Safari
DS218play
  • Google Chrome
  • Firefox
  • Microsoft Edge
  • Safari
DS220j
  • Google Chrome
  • Firefox
  • Microsoft Edge
  • Safari
Supported Language
DS420+ English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český, ภาษาไทย, 日本語, 한국어, 繁體中文, 简体中文
DS1520+ English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český, ภาษาไทย, 日本語, 한국어, 繁體中文, 简体中文
DS218play English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český, ภาษาไทย, 日本語, 한국어, 繁體中文, 简体中文
DS220j English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český, ภาษาไทย, 日本語, 한국어, 繁體中文, 简体中文
Notes
DS420+ For an updated list of supported browser versions, check the DSM Technical Specifications.
DS1520+ For an updated list of supported browser versions, check the DSM Technical Specifications.
DS218play For an updated list of supported browser versions, check the DSM Technical Specifications.
DS220j For an updated list of supported browser versions, check the DSM Technical Specifications.
Antivirus by McAfee (Trial)
DS420+
DS1520+
DS218play
DS220j
DS420+
DS1520+
DS218play
DS220j
DS420+
DS1520+
DS218play
DS220j
Maximum Users
DS420+ 1,000
DS1520+ 1,500
DS218play 500
DS220j 10
Maximum Number of Concurrent Users
DS420+ 50
DS1520+ 100
DS218play
DS220j
Notes
DS420+ When applicable, tested systems are configured with maximum memory and set to allow the maximum number of connections.
DS1520+ When applicable, tested systems are configured with maximum memory and set to allow the maximum number of connections.
DS218play When applicable, tested systems are configured with maximum memory and set to allow the maximum number of connections.
DS220j When applicable, tested systems are configured with maximum memory and set to allow the maximum number of connections.
Document Viewer
DS420+
DS1520+
DS218play
DS220j
Download Station
DS420+
DS1520+
DS218play
DS220j
Maximum Concurrent Download Tasks
DS420+ 80
DS1520+ 80
DS218play 80
DS220j 50
DS420+
DS1520+
DS218play
DS220j
Maximum iSCSI Target Number
DS420+ 128
DS1520+ 128
DS218play 10
DS220j 10
Maximum LUN
DS420+ 256
DS1520+ 256
DS218play 10
DS220j 10
LUN Clone/Snapshot, Windows ODX
DS420+
DS1520+
DS218play
DS220j
Notes
DS420+ iSCSI Manager has been renamed to SAN Manager in DSM 7.0.
DS1520+ iSCSI Manager has been renamed to SAN Manager in DSM 7.0.
DS218play iSCSI Manager has been renamed to SAN Manager in DSM 7.0.
DS220j iSCSI Manager has been renamed to SAN Manager in DSM 7.0.
DS420+
DS1520+
DS218play
DS220j
Free Email Accounts
Maximum Number of Concurrent Users
DS420+ 50
DS1520+ 100
DS218play
DS220j
Maximum Server Performance
DS420+ 936,000 emails per day, approx. 28GB
DS1520+ 1,224,000 emails per day, approx. 37GB
DS218play
DS220j
Notes
DS420+
  • Models with more than 4 bays were installed with two SSDs for SSD cache.
  • For tested models with expandable memory, the maximum amount of RAM was installed.
  • The performance of the mail system will slightly decrease in high-availability mode due to data synchronization between the two servers.
  • Functions that were enabled in all of the tests above: anti-spam, anti-virus, DNSBL, greylist, content scan, full-text search (English only).
DS1520+
  • Models with more than 4 bays were installed with two SSDs for SSD cache.
  • For tested models with expandable memory, the maximum amount of RAM was installed.
  • The performance of the mail system will slightly decrease in high-availability mode due to data synchronization between the two servers.
  • Functions that were enabled in all of the tests above: anti-spam, anti-virus, DNSBL, greylist, content scan, full-text search (English only).
DS218play
DS220j
DS420+
DS1520+
DS218play
DS220j
DLNA Compliance
DS420+
DS1520+
DS218play
DS220j
DS420+
DS1520+
DS218play
DS220j
Facial Recognition
DS420+
DS1520+
DS218play
DS220j
Notes
DS420+ Photo Station and Synology Moments are succeeded by Synology Photos in DSM 7.0. For a features comparison, check this article.
DS1520+ Photo Station and Synology Moments are succeeded by Synology Photos in DSM 7.0. For a features comparison, check this article.
DS218play Photo Station and Synology Moments are succeeded by Synology Photos in DSM 7.0. For a features comparison, check this article.
DS220j Photo Station and Synology Moments are succeeded by Synology Photos in DSM 7.0. For a features comparison, check this article.
DS420+
DS1520+
DS218play
DS220j
Maximum Snapshots per Shared Folder
DS420+ 1,024
DS1520+ 1,024
DS218play
DS220j
Maximum of System Snapshots
DS420+ 65,536
DS1520+ 65,536
DS218play
DS220j
DS420+
DS1520+
DS218play
DS220j
Maximum IP cam (Licenses required)
DS420+ 25 (including 2 Free License) (see all supported IP cameras)
DS1520+ 40 (including 2 Free License) (see all supported IP cameras)
DS218play 15 (including 2 Free License) (see all supported IP cameras)
DS220j 12 (including 2 Free License) (see all supported IP cameras)
Total FPS (H.264)
DS420+ 750 FPS @ 720p (1280x720)
700 FPS @ 1080p (1920x1080)
350 FPS @ 3M (2048x1536)
240 FPS @ 5M (2591x1944)
120 FPS @ 4K (3840x2160)
DS1520+ 1200 FPS @ 720p (1280x720)
1050 FPS @ 1080p (1920x1080)
600 FPS @ 3M (2048x1536)
360 FPS @ 5M (2591x1944)
200 FPS @ 4K (3840x2160)
DS218play 450 FPS @ 720p (1280x720)
180 FPS @ 1080p (1920x1080)
110 FPS @ 3M (2048x1536)
80 FPS @ 5M (2591x1944)
40 FPS @ 4K (3840x2160)
DS220j 360 FPS @ 720p (1280x720)
110 FPS @ 1080p (1920x1080)
70 FPS @ 3M (2048x1536)
40 FPS @ 5M (2591x1944)
30 FPS @ 4K (3840x2160)
Total FPS (H.265)
DS420+ 750 FPS @ 720p (1280x720)
750 FPS @ 1080p (1920x1080)
500 FPS @ 3M (2048x1536)
250 FPS @ 5M (2591x1944)
200 FPS @ 4K (3840x2160)
DS1520+ 1200 FPS @ 720p (1280x720)
1200 FPS @ 1080p (1920x1080)
1000 FPS @ 3M (2048x1536)
600 FPS @ 5M (2591x1944)
300 FPS @ 4K (3840x2160)
DS218play 450 FPS @ 720p (1280x720)
450 FPS @ 1080p (1920x1080)
210 FPS @ 3M (2048x1536)
120 FPS @ 5M (2591x1944)
60 FPS @ 4K (3840x2160)
DS220j 360 FPS @ 720p (1280x720)
240 FPS @ 1080p (1920x1080)
110 FPS @ 3M (2048x1536)
70 FPS @ 5M (2591x1944)
40 FPS @ 4K (3840x2160)
Total FPS (MJPEG)
DS420+ 450 FPS @ 720p (1280x720)
250 FPS @ 1080p (1920x1080)
160 FPS @ 3M (2048x1536)
130 FPS @ 5M (2591x1944)
DS1520+ 680 FPS @ 720p (1280x720)
400 FPS @ 1080p (1920x1080)
300 FPS @ 3M (2048x1536)
200 FPS @ 5M (2591x1944)
DS218play 210 FPS @ 720p (1280x720)
70 FPS @ 1080p (1920x1080)
50 FPS @ 3M (2048x1536)
30 FPS @ 5M (2591x1944)
DS220j 80 FPS @ 720p (1280x720)
50 FPS @ 1080p (1920x1080)
40 FPS @ 3M (2048x1536)
20 FPS @ 5M (2591x1944)
Notes
DS420+
  • Maximum IP cameras and FPS figures are tested with the device fully populated with drives and under a continuous recording setup.
  • Actual system capabilities may differ depending on system configuration, drive performance, number of features enabled, and if additional workloads are present.
DS1520+
  • Maximum IP cameras and FPS figures are tested with the device fully populated with drives and under a continuous recording setup.
  • Actual system capabilities may differ depending on system configuration, drive performance, number of features enabled, and if additional workloads are present.
DS218play
  • Maximum IP cameras and FPS figures are tested with the device fully populated with drives and under a continuous recording setup.
  • Actual system capabilities may differ depending on system configuration, drive performance, number of features enabled, and if additional workloads are present.
DS220j
  • Maximum IP cameras and FPS figures are tested with the device fully populated with drives and under a continuous recording setup.
  • Actual system capabilities may differ depending on system configuration, drive performance, number of features enabled, and if additional workloads are present.
DS420+
DS1520+
DS218play
DS220j
Recommended Number of Concurrent Sync Clients
DS420+ 350 (the number of connections that can be maintained when the recommended number of hosted files was reached)
DS1520+ 350 (the number of connections that can be maintained when the recommended number of hosted files was reached)
DS218play 200 (the number of connections that can be maintained when the recommended number of hosted files was reached)
DS220j 200 (the number of connections that can be maintained when the recommended number of hosted files was reached)
Recommended Number of Hosted Files
DS420+ 5,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
DS1520+ 5,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
DS218play 500,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
DS220j 500,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
Notes
DS420+
  • Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
  • Utilizing SSD cache can significantly improve performance.
  • For tested models with expandable memory, the maximum amount of RAM was installed.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
DS1520+
  • Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
  • Utilizing SSD cache can significantly improve performance.
  • For tested models with expandable memory, the maximum amount of RAM was installed.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
DS218play
  • Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
  • EXT4 file system and non-encrypted shared folders were used during the aforementioned testing.
DS220j
  • Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
  • EXT4 file system and non-encrypted shared folders were used during the aforementioned testing.
DS420+
DS1520+
DS218play
DS220j
Maximum Users
DS420+ 600
DS1520+ 1,200
DS218play 200
DS220j 200
Notes
DS420+
  • Multiple files were opened for testing and each file was edited by 30 users simultaneously.
  • For tested models with expandable memory, the maximum amount of RAM was installed.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
DS1520+
  • Multiple files were opened for testing and each file was edited by 30 users simultaneously.
  • For tested models with expandable memory, the maximum amount of RAM was installed.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
DS218play
  • Multiple files were opened for testing and each file was edited by 30 users simultaneously.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
DS220j
  • Multiple files were opened for testing and each file was edited by 30 users simultaneously.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
DS420+
DS1520+
DS218play
DS220j
DS420+
DS1520+
DS218play
DS220j
Recommended Virtual Machine Instances
DS420+ 2 (Learn more)
DS1520+ 4 (Learn more)
DS218play
DS220j
Recommended Virtual DSM Number (Licenses required)
DS420+ 2 (including 1 Free License)
DS1520+ 4 (including 1 Free License)
DS218play
DS220j
Notes
DS420+ The specifications vary depending on system configuration and memory size.
DS1520+ The specifications vary depending on system configuration and memory size.
DS218play
DS220j
DS420+
DS1520+
DS218play
DS220j
Maximum Connections
DS420+ 40
DS1520+ 40
DS218play 20
DS220j 10