1. products list

Comparison results

DS218 DS218+
Hardware Specs
Hardware Specifications
CPU
CPU Model Realtek RTD1296 Intel Celeron J3355
CPU Architecture 64-bit 64-bit
CPU Frequency 4-core 1.4 GHz 2-core 2.0 (base) / 2.5 (burst) GHz
Hardware Encryption Engine
Hardware Encryption Engine (AES-NI)
Hardware Transcoding Engine 10-bit H.265 (HEVC), MPEG-4 Part 2, MPEG-2, VC-1; maximum resolution: 4K (4096 x 2160); maximum frame rate per second (FPS): 60 H.264 (AVC), H.265 (HEVC), MPEG-2 and VC-1; maximum resolution: 4K (4096 x 2160); maximum frame rate per second (FPS): 30
Memory
System Memory 2 GB DDR4 non-ECC 2 GB DDR3L non-ECC SO-DIMM
Memory Module Pre-installed 2 GB (2 GB x 1)
Total Memory Slots 2
Memory Expandable up to 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.
Storage
Drive Bays 2 2
Compatible Drive Type* (See all supported drives)
  • 3.5" SATA HDD
  • 2.5" SATA HDD
  • 2.5" SATA SSD
  • 3.5" SATA HDD
  • 2.5" SATA HDD
  • 2.5" SATA SSD
Maximum Internal Raw Capacity 32 TB (16 TB drive x 2) (Capacity may vary by RAID types) 32 TB (16 TB drive x 2) (Capacity may vary by RAID types)
Maximum Single Volume Size* 108 TB 108 TB
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.
  • The maximum single volume size is not directly related to the maximum raw capacity. (Learn more)
  • "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.
  • The maximum single volume size is not directly related to the maximum raw capacity. (Learn more)
  • Each internal volume (may consist of multiple drives) is expandable up to 108TB.
External Ports
RJ-45 1GbE LAN Port 1 1
USB 2.0 Port 1
USB 3.0 Port 2 3
eSATA Port 1
USB / SD Copy
File System
Internal Drives
  • Btrfs
  • EXT4
  • Btrfs
  • EXT4
External Drives
  • Btrfs
  • EXT4
  • EXT3
  • FAT
  • NTFS
  • HFS+
  • exFAT*
  • Btrfs
  • EXT4
  • EXT3
  • FAT
  • NTFS
  • HFS+
  • exFAT*
Notes exFAT Access is purchased separately in Package Center. exFAT Access is purchased separately in Package Center.
Appearance
Size (Height x Width x Depth) 165 mm x 108 mm x 233.2 mm 165 mm x 108 mm x 232.2 mm
Weight 1.3 kg 1.30 kg
Others
System Fan 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
Brightness Adjustable Front LED Indicators
Power Recovery
Noise Level* 19.3 dB(A) 19.3 dB(A)
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter 60 W 60 W
AC Input Power Voltage 100 V to 240 V AC 100 V to 240 V AC
Power Frequency 50/60 Hz, Single Phase 50/60 Hz, Single Phase
Power Consumption* 14.99 W (Access)
5.78 W (HDD Hibernation)		 17.23 W (Access)
5.4 W (HDD Hibernation)
British Thermal Unit 51.15 BTU/hr (Access)
19.72 BTU/hr (HDD Hibernation)		 58.79 BTU/hr (Access)
18.43 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%
Temperature
Operating Temperature 0°C to 40°C (32°F to 104°F) 5°C to 40°C (40°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)
Relative Humidity 5% to 95% RH 5% to 95% RH
Certification
  • EAC
  • CCC
  • RCM
  • KC
  • FCC
  • CE
  • BSMI
  • EAC
  • VCCI
  • CCC
  • RCM
  • KC
  • FCC
  • CE
  • BSMI
Warranty 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)
Environment 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 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
  • DDR3 non-ECC SO-DIMM: D3NS1866L-4G
  • Expansion Units: DX517
  • 2.5" SATA SSD: SAT5200
  • VisualStation: VS960HD/VS360HD
  • Surveillance Device License Pack
Software Specs
DSM Specifications
Storage Management
Maximum Internal Volume Number 64 64
Maximum iSCSI Target Number 10 128
Maximum iSCSI LUN 10 256
iSCSI LUN Clone/Snapshot, Windows ODX
SSD TRIM
Supported RAID Type
  • 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 1
Volume Expansion with Larger HDDs
  • Synology Hybrid RAID
  • RAID 1
  • Synology Hybrid RAID
  • RAID 1
Volume Expansion by Adding a HDD Synology Hybrid RAID Synology Hybrid RAID
File Services
File Protocol CIFS/AFP/NFS/FTP/WebDAV CIFS/AFP/NFS/FTP/WebDAV
Maximum Concurrent CIFS/AFP/FTP Connections 200 500
Maximum Concurrent CIFS/AFP/FTP Connections (with RAM expansion) 1,500
Windows Access Control List (ACL) Integration
NFS Kerberos Authentication
Account & Shared Folder
Maximum Local User Accounts 2,048 2,048
Maximum Local Groups 256 256
Maximum Shared Folder 256 256
Maximum Shared Folder Sync Tasks 4 8
Log Center
Syslog Events per Second 400 400
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
Supported Browsers
  • Chrome
  • Firefox
  • Edge
  • Internet Explorer 10 onwards
  • Safari 10 onwards
  • Safari (iOS 10 onwards)
  • Chrome (Android 6.0 onwards)
  • Chrome
  • Firefox
  • Edge
  • Internet Explorer 10 onwards
  • Safari 10 onwards
  • Safari (iOS 10 onwards)
  • Chrome (Android 6.0 onwards)
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
Add-on Packages view the complete package list
Antivirus by McAfee (Trial)
Central Management System
Synology Chat
Maximum Users 500 1,000
Notes
  • The number of concurrent HTTP connections for Synology Chat was configured to the maximum.
  • CPU and RAM usage were both under 80% when the number of maximum users was reached.
  • The number of concurrent HTTP connections for Synology Chat was configured to the maximum.
  • CPU and RAM usage were both under 80% when the number of maximum users was reached.
  • For tested models with expandable memory, the maximum amount of RAM was installed.
Cloud Station Server
Recommended Number of Hosted Files 100,000 500,000
Recommended Number of Concurrent Sync Clients 200 (the number of connections that can be maintained when the recommended number of hosted files was reached) 450 (the number of connections that can be maintained when the recommended number of hosted files was reached)
Notes
  • The maximum number of concurrently connected devices refers to the maximum number of devices that can remain connected at the same time.
  • The maximum number of hosted files refers to the maximum number of files that can be indexed and hosted by the Cloud Station Server service. RAM expansion was not used during testing.
  • Non-encrypted shared folders were used during the aforementioned testing.
  • The maximum number of concurrently connected devices refers to the maximum number of devices that can remain connected at the same time.
  • The maximum number of hosted files refers to the maximum number of files that can be indexed and hosted by the Cloud Station Server service. RAM expansion was not used during testing.
  • Non-encrypted shared folders were used during the aforementioned testing.
Document Viewer
Download Station
Maximum Concurrent Download Tasks 80 80
exFAT Access (Optional)
Synology MailPlus / MailPlus Server
Free Email Accounts 5 (Licenses required for additional accounts)
Maximum Number of Concurrent Users 50
Maximum Server Performance 623,000 emails per day, approx. 19GB
Notes
  • The CPU and RAM usage were both under 80% when testing the maximum number of concurrent users.
  • 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
Moments
Facial Recognition
Subject Recognition
Auto Color & Rotate
Moments Select
Snapshot Replication
Maximum Snapshots per Shared Folder 256 1,024
Maximum of System Snapshots 4,096 65,536
Surveillance Station
Maximum IP cam (Licenses required) 20 (including 2 Free License) (See All Supported IP Cameras) 25 (including 2 Free License) (See All Supported IP Cameras)
Total FPS (H.264) 600 FPS @ 720p (1280x720)
300 FPS @ 1080p (1920x1080)
200 FPS @ 3M (2048x1536)
150 FPS @ 5M (2591x1944)
110 FPS @ 4K (3840x2160)		 750 FPS @ 720p (1280x720)
600 FPS @ 1080p (1920x1080)
350 FPS @ 3M (2048x1536)
250 FPS @ 5M (2591x1944)
120 FPS @ 4K (3840x2160)
Total FPS (H.265) 600 FPS @ 720p (1280x720)
300 FPS @ 1080p (1920x1080)
240 FPS @ 3M (2048x1536)
200 FPS @ 5M (2591x1944)
180 FPS @ 4K (3840x2160)		 750 FPS @ 720p (1280x720)
750 FPS @ 1080p (1920x1080)
450 FPS @ 3M (2048x1536)
250 FPS @ 5M (2591x1944)
200 FPS @ 4K (3840x2160)
Total FPS (MJPEG) 240 FPS @ 720p (1280x720)
200 FPS @ 1080p (1920x1080)
130 FPS @ 3M (2048x1536)
80 FPS @ 5M (2591x1944)		 450 FPS @ 720p (1280x720)
250 FPS @ 1080p (1920x1080)
160 FPS @ 3M (2048x1536)
130 FPS @ 5M (2591x1944)
Notes
  • Surveillance Station throughput is tested with Axis network camera, using continuous recording with live view from Surveillance Station and motion detection by camera. Live view and recording are sharing the same stream from the camera.
  • The maximum channel number also includes devices installed on Virtual DSM.
  • Total FPS may be affected by other services running at the same time (e.g., archive tasks performed by Archive Vault).
  • Surveillance Station throughput is tested with Axis network camera, using continuous recording with live view from Surveillance Station and motion detection by camera. Live view and recording are sharing the same stream from the camera.
  • The maximum channel number also includes devices installed on Virtual DSM.
  • Total FPS may be affected by other services running at the same time (e.g., archive tasks performed by Archive Vault).
Synology Drive
Recommended Number of Hosted Files 100,000 (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)
Recommended Number of Concurrent Sync Clients 200 (the number of connections that can be maintained when the recommended number of hosted files was reached) 450 (the number of connections that can be maintained when the recommended number of hosted files was reached)
Notes
  • Exceeding the limits above may result in longer response time in file operations.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
  • For tested models with expandable memory, the maximum amount of RAM was installed.
  • Exceeding the limits above may result in longer response time in file operations.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
Synology Office
Maximum Users 200 400
Notes
  • Multiple files were opened for testing and each file was edited by 30 users simultaneously.
  • CPU and RAM usage were both under 80% when the number of maximum users was reached.
  • 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.
  • CPU and RAM usage were both under 80% when the number of maximum users was reached.
  • 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
Video Station
Video Transcoding 4K Group 3 (See more) 4K Group 1 (See more)
Maximum Transcoding Channel Number 1 channel, 60 FPS @ 4K (4096 x 2160), H.265 (HEVC), 10-bit or
1 channel, 30 FPS @ 1080p (1920 × 1080), H.264 (AVC)/MPEG-4 Part 2 (XVID, DIVX5)/MPEG-2/VC-1		 2 channel, 30 FPS @ 4K (4096 x 2160), H.264 (AVC)/H.265 (HEVC) or
2 channel, 30 FPS @ 1080p (1920×1080), H.264 (AVC)/H.265 (HEVC)/MPEG-2/VC-1
Virtual Machine Manager
Recommended Virtual Machine Instances 2 (Learn more)
Recommended Virtual DSM Number (Licenses required) 2 (including 1 Free License)
Notes The specifications vary depending on system configuration and memory size.
VPN Server
Maximum Connections 20 30
Hardware Specs
Hardware Specifications
CPU
CPU Model
DS218 Realtek RTD1296
DS218+ Intel Celeron J3355
CPU Architecture
DS218 64-bit
DS218+ 64-bit
CPU Frequency
DS218 4-core 1.4 GHz
DS218+ 2-core 2.0 (base) / 2.5 (burst) GHz
Hardware Encryption Engine
DS218
DS218+
Hardware Encryption Engine (AES-NI)
DS218
DS218+
Hardware Transcoding Engine
DS218 10-bit H.265 (HEVC), MPEG-4 Part 2, MPEG-2, VC-1; maximum resolution: 4K (4096 x 2160); maximum frame rate per second (FPS): 60
DS218+ H.264 (AVC), H.265 (HEVC), MPEG-2 and VC-1; maximum resolution: 4K (4096 x 2160); maximum frame rate per second (FPS): 30
Memory
System Memory
DS218 2 GB DDR4 non-ECC
DS218+ 2 GB DDR3L non-ECC SO-DIMM
Memory Module Pre-installed
DS218
DS218+ 2 GB (2 GB x 1)
Total Memory Slots
DS218
DS218+ 2
Memory Expandable up to
DS218
DS218+ 6 GB (2 GB + 4 GB)
Notes
DS218 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.
DS218+
  • 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.
Storage
Drive Bays
DS218 2
DS218+ 2
Compatible Drive Type* (See all supported drives)
DS218
  • 3.5" SATA HDD
  • 2.5" SATA HDD
  • 2.5" SATA SSD
DS218+
  • 3.5" SATA HDD
  • 2.5" SATA HDD
  • 2.5" SATA SSD
Maximum Internal Raw Capacity
DS218 32 TB (16 TB drive x 2) (Capacity may vary by RAID types)
DS218+ 32 TB (16 TB drive x 2) (Capacity may vary by RAID types)
Maximum Single Volume Size*
DS218 108 TB
DS218+ 108 TB
Hot Swappable Drive
DS218
DS218+
Notes
DS218
  • "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.
  • The maximum single volume size is not directly related to the maximum raw capacity. (Learn more)
DS218+
  • "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.
  • The maximum single volume size is not directly related to the maximum raw capacity. (Learn more)
  • Each internal volume (may consist of multiple drives) is expandable up to 108TB.
External Ports
RJ-45 1GbE LAN Port
DS218 1
DS218+ 1
USB 2.0 Port
DS218 1
DS218+
USB 3.0 Port
DS218 2
DS218+ 3
eSATA Port
DS218
DS218+ 1
USB / SD Copy
DS218
DS218+
File System
Internal Drives
DS218
  • Btrfs
  • EXT4
DS218+
  • Btrfs
  • EXT4
External Drives
DS218
  • Btrfs
  • EXT4
  • EXT3
  • FAT
  • NTFS
  • HFS+
  • exFAT*
DS218+
  • Btrfs
  • EXT4
  • EXT3
  • FAT
  • NTFS
  • HFS+
  • exFAT*
Notes
DS218 exFAT Access is purchased separately in Package Center.
DS218+ exFAT Access is purchased separately in Package Center.
Appearance
Size (Height x Width x Depth)
DS218 165 mm x 108 mm x 233.2 mm
DS218+ 165 mm x 108 mm x 232.2 mm
Weight
DS218 1.3 kg
DS218+ 1.30 kg
Others
System Fan
DS218 92 mm x 92 mm x 1 pcs
DS218+ 92 mm x 92 mm x 1 pcs
Fan Speed Mode
DS218
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
DS218+
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
Brightness Adjustable Front LED Indicators
DS218
DS218+
Power Recovery
DS218
DS218+
Noise Level*
DS218 19.3 dB(A)
DS218+ 19.3 dB(A)
Scheduled Power On / Off
DS218
DS218+
Wake on LAN / WAN
DS218
DS218+
Power Supply Unit / Adapter
DS218 60 W
DS218+ 60 W
AC Input Power Voltage
DS218 100 V to 240 V AC
DS218+ 100 V to 240 V AC
Power Frequency
DS218 50/60 Hz, Single Phase
DS218+ 50/60 Hz, Single Phase
Power Consumption*
DS218 14.99 W (Access)
5.78 W (HDD Hibernation)
DS218+ 17.23 W (Access)
5.4 W (HDD Hibernation)
British Thermal Unit
DS218 51.15 BTU/hr (Access)
19.72 BTU/hr (HDD Hibernation)
DS218+ 58.79 BTU/hr (Access)
18.43 BTU/hr (HDD Hibernation)
Notes
DS218
  • 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%
DS218+
  • 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
DS218 0°C to 40°C (32°F to 104°F)
DS218+ 5°C to 40°C (40°F to 104°F)
Storage Temperature
DS218 -20°C to 60°C (-5°F to 140°F)
DS218+ -20°C to 60°C (-5°F to 140°F)
Relative Humidity
DS218 5% to 95% RH
DS218+ 5% to 95% RH
Certification
DS218
  • EAC
  • CCC
  • RCM
  • KC
  • FCC
  • CE
  • BSMI
DS218+
  • EAC
  • VCCI
  • CCC
  • RCM
  • KC
  • FCC
  • CE
  • BSMI
Warranty
DS218 2 Years
DS218+ 2 Years
Notes
DS218 The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
DS218+ The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment
DS218 RoHS Compliant
DS218+ RoHS Compliant
Packaging Content
DS218
  • 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
DS218+
  • 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
DS218
DS218+
  • DDR3 non-ECC SO-DIMM: D3NS1866L-4G
  • Expansion Units: DX517
  • 2.5" SATA SSD: SAT5200
  • VisualStation: VS960HD/VS360HD
  • Surveillance Device License Pack
Software Specs
DSM Specifications
Storage Management
Maximum Internal Volume Number
DS218 64
DS218+ 64
Maximum iSCSI Target Number
DS218 10
DS218+ 128
Maximum iSCSI LUN
DS218 10
DS218+ 256
iSCSI LUN Clone/Snapshot, Windows ODX
DS218
DS218+
SSD TRIM
DS218
DS218+
Supported RAID Type
DS218
  • Synology Hybrid RAID
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
DS218+
  • Synology Hybrid RAID
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
RAID Migration
DS218 Basic to RAID 1
DS218+ Basic to RAID 1
Volume Expansion with Larger HDDs
DS218
  • Synology Hybrid RAID
  • RAID 1
DS218+
  • Synology Hybrid RAID
  • RAID 1
Volume Expansion by Adding a HDD
DS218 Synology Hybrid RAID
DS218+ Synology Hybrid RAID
File Services
File Protocol
DS218 CIFS/AFP/NFS/FTP/WebDAV
DS218+ CIFS/AFP/NFS/FTP/WebDAV
Maximum Concurrent CIFS/AFP/FTP Connections
DS218 200
DS218+ 500
Maximum Concurrent CIFS/AFP/FTP Connections (with RAM expansion)
DS218
DS218+ 1,500
Windows Access Control List (ACL) Integration
DS218
DS218+
NFS Kerberos Authentication
DS218
DS218+
Account & Shared Folder
Maximum Local User Accounts
DS218 2,048
DS218+ 2,048
Maximum Local Groups
DS218 256
DS218+ 256
Maximum Shared Folder
DS218 256
DS218+ 256
Maximum Shared Folder Sync Tasks
DS218 4
DS218+ 8
Log Center
DS218
DS218+
Syslog Events per Second
DS218 400
DS218+ 400
General Specifications
Networking Protocols
DS218 SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
DS218+ SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers
DS218
  • Chrome
  • Firefox
  • Edge
  • Internet Explorer 10 onwards
  • Safari 10 onwards
  • Safari (iOS 10 onwards)
  • Chrome (Android 6.0 onwards)
DS218+
  • Chrome
  • Firefox
  • Edge
  • Internet Explorer 10 onwards
  • Safari 10 onwards
  • Safari (iOS 10 onwards)
  • Chrome (Android 6.0 onwards)
Supported Language
DS218 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
DS218+ 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
Add-on Packages view the complete package list
Antivirus by McAfee (Trial)
DS218
DS218+
Central Management System
DS218
DS218+
Synology Chat
DS218
DS218+
Maximum Users
DS218 500
DS218+ 1,000
Notes
DS218
  • The number of concurrent HTTP connections for Synology Chat was configured to the maximum.
  • CPU and RAM usage were both under 80% when the number of maximum users was reached.
DS218+
  • The number of concurrent HTTP connections for Synology Chat was configured to the maximum.
  • CPU and RAM usage were both under 80% when the number of maximum users was reached.
  • For tested models with expandable memory, the maximum amount of RAM was installed.
Cloud Station Server
DS218
DS218+
Recommended Number of Hosted Files
DS218 100,000
DS218+ 500,000
Recommended Number of Concurrent Sync Clients
DS218 200 (the number of connections that can be maintained when the recommended number of hosted files was reached)
DS218+ 450 (the number of connections that can be maintained when the recommended number of hosted files was reached)
Notes
DS218
  • The maximum number of concurrently connected devices refers to the maximum number of devices that can remain connected at the same time.
  • The maximum number of hosted files refers to the maximum number of files that can be indexed and hosted by the Cloud Station Server service. RAM expansion was not used during testing.
  • Non-encrypted shared folders were used during the aforementioned testing.
DS218+
  • The maximum number of concurrently connected devices refers to the maximum number of devices that can remain connected at the same time.
  • The maximum number of hosted files refers to the maximum number of files that can be indexed and hosted by the Cloud Station Server service. RAM expansion was not used during testing.
  • Non-encrypted shared folders were used during the aforementioned testing.
Document Viewer
DS218
DS218+
Download Station
DS218
DS218+
Maximum Concurrent Download Tasks
DS218 80
DS218+ 80
exFAT Access (Optional)
DS218
DS218+
Synology MailPlus / MailPlus Server
DS218
DS218+
Free Email Accounts
DS218
DS218+ 5 (Licenses required for additional accounts)
Maximum Number of Concurrent Users
DS218
DS218+ 50
Maximum Server Performance
DS218
DS218+ 623,000 emails per day, approx. 19GB
Notes
DS218
DS218+
  • The CPU and RAM usage were both under 80% when testing the maximum number of concurrent users.
  • 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
DS218
DS218+
DLNA Compliance
DS218
DS218+
Moments
DS218
DS218+
Facial Recognition
DS218
DS218+
Subject Recognition
DS218
DS218+
Auto Color & Rotate
DS218
DS218+
Moments Select
DS218
DS218+
Snapshot Replication
DS218
DS218+
Maximum Snapshots per Shared Folder
DS218 256
DS218+ 1,024
Maximum of System Snapshots
DS218 4,096
DS218+ 65,536
Surveillance Station
DS218
DS218+
Maximum IP cam (Licenses required)
DS218 20 (including 2 Free License) (See All Supported IP Cameras)
DS218+ 25 (including 2 Free License) (See All Supported IP Cameras)
Total FPS (H.264)
DS218 600 FPS @ 720p (1280x720)
300 FPS @ 1080p (1920x1080)
200 FPS @ 3M (2048x1536)
150 FPS @ 5M (2591x1944)
110 FPS @ 4K (3840x2160)
DS218+ 750 FPS @ 720p (1280x720)
600 FPS @ 1080p (1920x1080)
350 FPS @ 3M (2048x1536)
250 FPS @ 5M (2591x1944)
120 FPS @ 4K (3840x2160)
Total FPS (H.265)
DS218 600 FPS @ 720p (1280x720)
300 FPS @ 1080p (1920x1080)
240 FPS @ 3M (2048x1536)
200 FPS @ 5M (2591x1944)
180 FPS @ 4K (3840x2160)
DS218+ 750 FPS @ 720p (1280x720)
750 FPS @ 1080p (1920x1080)
450 FPS @ 3M (2048x1536)
250 FPS @ 5M (2591x1944)
200 FPS @ 4K (3840x2160)
Total FPS (MJPEG)
DS218 240 FPS @ 720p (1280x720)
200 FPS @ 1080p (1920x1080)
130 FPS @ 3M (2048x1536)
80 FPS @ 5M (2591x1944)
DS218+ 450 FPS @ 720p (1280x720)
250 FPS @ 1080p (1920x1080)
160 FPS @ 3M (2048x1536)
130 FPS @ 5M (2591x1944)
Notes
DS218
  • Surveillance Station throughput is tested with Axis network camera, using continuous recording with live view from Surveillance Station and motion detection by camera. Live view and recording are sharing the same stream from the camera.
  • The maximum channel number also includes devices installed on Virtual DSM.
  • Total FPS may be affected by other services running at the same time (e.g., archive tasks performed by Archive Vault).
DS218+
  • Surveillance Station throughput is tested with Axis network camera, using continuous recording with live view from Surveillance Station and motion detection by camera. Live view and recording are sharing the same stream from the camera.
  • The maximum channel number also includes devices installed on Virtual DSM.
  • Total FPS may be affected by other services running at the same time (e.g., archive tasks performed by Archive Vault).
Synology Drive
DS218
DS218+
Recommended Number of Hosted Files
DS218 100,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
DS218+ 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)
Recommended Number of Concurrent Sync Clients
DS218 200 (the number of connections that can be maintained when the recommended number of hosted files was reached)
DS218+ 450 (the number of connections that can be maintained when the recommended number of hosted files was reached)
Notes
DS218
  • Exceeding the limits above may result in longer response time in file operations.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
DS218+
  • For tested models with expandable memory, the maximum amount of RAM was installed.
  • Exceeding the limits above may result in longer response time in file operations.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
Synology Office
DS218
DS218+
Maximum Users
DS218 200
DS218+ 400
Notes
DS218
  • Multiple files were opened for testing and each file was edited by 30 users simultaneously.
  • CPU and RAM usage were both under 80% when the number of maximum users was reached.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
DS218+
  • Multiple files were opened for testing and each file was edited by 30 users simultaneously.
  • CPU and RAM usage were both under 80% when the number of maximum users was reached.
  • 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
Video Station
DS218
DS218+
Video Transcoding
DS218 4K Group 3 (See more)
DS218+ 4K Group 1 (See more)
Maximum Transcoding Channel Number
DS218 1 channel, 60 FPS @ 4K (4096 x 2160), H.265 (HEVC), 10-bit or
1 channel, 30 FPS @ 1080p (1920 × 1080), H.264 (AVC)/MPEG-4 Part 2 (XVID, DIVX5)/MPEG-2/VC-1
DS218+ 2 channel, 30 FPS @ 4K (4096 x 2160), H.264 (AVC)/H.265 (HEVC) or
2 channel, 30 FPS @ 1080p (1920×1080), H.264 (AVC)/H.265 (HEVC)/MPEG-2/VC-1
Virtual Machine Manager
DS218
DS218+
Recommended Virtual Machine Instances
DS218
DS218+ 2 (Learn more)
Recommended Virtual DSM Number (Licenses required)
DS218
DS218+ 2 (including 1 Free License)
Notes
DS218
DS218+ The specifications vary depending on system configuration and memory size.
VPN Server
DS218
DS218+
Maximum Connections
DS218 20
DS218+ 30