Comparison results

Highlight Differences

DS223

DS423

Hardware Specifications
CPU
CPU Model	Realtek RTD1619B	Realtek RTD1619B
CPU Quantity	1	1
CPU Core	4	4
CPU Architecture	64-bit	64-bit
CPU Frequency	1.7 GHz	1.7 GHz
Hardware Encryption Engine
Memory
System Memory	2 GB DDR4 non-ECC	2 GB DDR4 non-ECC
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.	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	4
Drive Type (See all supported drives)	3.5" SATA HDD 2.5" SATA SSD	3.5" SATA HDD 2.5" SATA SSD
Hot Swappable Drive*
External Ports
RJ-45 1GbE LAN Port	1	2
USB 3.2 Gen 1 Port	3	2
USB Copy
Notes	MTU value of 1GbE LAN port has a limit of 1500.	MTU value of 1GbE LAN port has a limit of 1500.
Appearance
Size (Height x Width x Depth)	165 mm x 108 mm x 232.7 mm	184 mm x 168 mm x 230 mm
Weight	1.28 kg	2.21 kg
Others
System Fan	92 mm x 92 mm x 1 pcs	80 mm x 80 mm x 2 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*	14.6 dB(A)	20.6 dB(A)
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter	60 watts	90 watts
AC Input Power Voltage	100V to 240V AC	100V to 240V AC
Power Frequency	50/60 Hz, Single Phase	50/60 Hz, Single Phase
Power Consumption*	17.343 watts (Access) 4.08 watts (HDD Hibernation)	32.41 watts (Access) 4.97 watts (HDD Hibernation)
British Thermal Unit	59.19 BTU/hr (Access) 13.92 BTU/hr (HDD Hibernation)	110.52 BTU/hr (Access) 16.95 BTU/hr (HDD Hibernation)
Notes	For more information on how power consumption is measured, refer to this article. Noise testing was conducted with the Synology system fully installed with Synology SATA SSDs and in an idle state. Two GRAS 40AE microphones were placed at a 1 m distance from the front and rear of the device. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%.	For more information on how power consumption is measured, refer to this article. 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)
Storage Temperature	-20°C to 60°C (-5°F to 140°F)	-20°C to 60°C (-5°F to 140°F)
Operating humidity	8% to 80% RH	8% to 80% RH
Storage Humidity	5% to 95% RH	5% to 95% RH
Certification	FCC CE BSMI VCCI RCM UKCA EAC CCC KC BIS	FCC CE BSMI VCCI RCM UKCA EAC CCC KC BIS
Warranty	2-year hardware warranty, extendable to 4 years with Extended Warranty Plus	2-year hardware warranty, extendable to 4 years with Extended Warranty Plus
Notes	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) Extended Warranty Plus is only available in Europe and North America. Refer to the Extended Warranty Plus website for details on supported countries/regions. (Learn more)	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) Extended Warranty Plus is only available in Europe and North America. Refer to the Extended Warranty Plus website for details on supported countries/regions. (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 2 Quick Installation Guide X 1
Optional Accessories	Enterprise Series 3.5" SATA HDD: HAT5300 Series Plus Series 3.5" SATA HDD: HAT3300 Series Enterprise Series 2.5" SATA SSD: SAT5200 Series	Enterprise Series 3.5" SATA HDD: HAT5300 Series Plus Series 3.5" SATA HDD: HAT3300 Series Enterprise Series 2.5" SATA SSD: SAT5200 Series

DSM Specifications
Storage Management
Maximum Single Volume Size	108 TB	108 TB
Maximum Internal Volume Number	64	64
SSD TRIM
Supported RAID Type	Synology Hybrid RAID Basic JBOD RAID 0 RAID 1	Synology Hybrid RAID Basic JBOD RAID 0 RAID 1 RAID 5 RAID 6 RAID 10
RAID Migration	Basic to RAID 1	Basic to RAID 1 Basic to RAID 5 RAID 1 to RAID 5 RAID 5 to RAID 6
Volume Expansion with Larger HDDs	Synology Hybrid RAID RAID 1	Synology Hybrid RAID RAID 1 RAID 5 RAID 6 RAID 10
Volume Expansion by Adding a HDD		Synology Hybrid RAID JBOD RAID 5
Global Hot Spare Supported RAID Type		Synology Hybrid RAID RAID 1 RAID 5
Notes	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. 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.
File System
Internal Drives	Btrfs ext4	Btrfs ext4
External Drives	Btrfs ext4 ext3 FAT32 NTFS HFS+ exFAT	Btrfs ext4 ext3 FAT32 NTFS HFS+ exFAT
File Services
File Protocol	SMB AFP NFS FTP WebDAV Rsync	SMB AFP NFS FTP WebDAV Rsync
Maximum Number of SMB Connections (FSCT-Based)	5	5
Windows Access Control List (ACL) Integration
NFS Kerberos Authentication
Notes	Connection value of this model is tested with Synology SATA HDD fully populated and all onboard network ports SMB performance was evaluated using Microsoft File Server Capacity Tool (FSCT) version 1.3, with the following configuration: Test workload: HomeFolder scenario provided by the FSCT tool Test duration: 600 seconds Domain controller & FSCT controller: Windows Server 2022 FSCT clients: 8 × Windows 10 machines SMB feature: Directory leasing enabled	Connection value of this model is tested with Synology SATA HDD fully populated and all onboard network ports SMB performance was evaluated using Microsoft File Server Capacity Tool (FSCT) version 1.3, with the following configuration: Test workload: HomeFolder scenario provided by the FSCT tool Test duration: 600 seconds Domain controller & FSCT controller: Windows Server 2022 FSCT clients: 8 × Windows 10 machines SMB feature: Directory leasing enabled
Account & Shared Folder
Maximum Local User Accounts	256	256
Maximum Local Groups	64	64
Maximum Shared Folder	64	64
Maximum Shared Folder Sync Tasks	2	2
Hyper Backup
Folder and Package Backup
Log Center
Syslog Events per Second	400	400
General Specifications
Supported 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 Safari	Chrome Firefox 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
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.

Add-on Packages view the complete package list
Synology Chat
Download Station
Maximum Concurrent Download Tasks	80	80
SAN Manager
Maximum iSCSI Target Number	2	2
Maximum LUN	2	2
LUN Clone/Snapshot, Windows ODX
Media Server
DLNA Compliance
Synology Photos
Facial Recognition
Snapshot Replication
Maximum Snapshots per Shared Folder	128	128
Maximum of System Snapshots	256	256
Surveillance Station
Default Licenses	2 (Additional cameras require purchase of licenses)	2 (Additional cameras require purchase of licenses)
Suggested Maximum IP Cameras and Total FPS (H.264)	1080p: 20 channels, 460 FPS 3M: 20 channels, 300 FPS 5M: 15 channels, 150 FPS 4K: 11 channels, 110 FPS	1080p: 30 channels, 600 FPS 3M: 30 channels, 300 FPS 5M: 20 channels, 200 FPS 4K: 15 channels, 150 FPS
Suggested Maximum IP Cameras and Total FPS (H.265)	1080p: 20 channels, 500 FPS 3M: 20 channels, 400 FPS 5M: 20 channels, 350 FPS 4K: 20 channels, 200 FPS	1080p: 30 channels, 800 FPS 3M: 30 channels, 500 FPS 5M: 30 channels, 450 FPS 4K: 20 channels, 200 FPS
Notes	Performance figures are obtained from testing conducted with the device fully populated with drives, with their default memory configuration, and under a continuous recording setup. Actual system capabilities may vary based on configuration, drive performance, enabled features, and the presence of additional workloads. Use NVR Selector to quickly find a suitable model based on your requirements. The number of streams that can be viewed simultaneously is twice the suggested maximum number of cameras. For example, if the suggested maximum number of cameras for a model is 10 under H.264, 1080p, the model can support up to 20 streams of the same specification at the same time.	Performance figures are obtained from testing conducted with the device fully populated with drives, with their default memory configuration, and under a continuous recording setup. Actual system capabilities may vary based on configuration, drive performance, enabled features, and the presence of additional workloads. Use NVR Selector to quickly find a suitable model based on your requirements. The number of streams that can be viewed simultaneously is twice the suggested maximum number of cameras. For example, if the suggested maximum number of cameras for a model is 10 under H.264, 1080p, the model can support up to 20 streams of the same specification at the same time.
Synology Drive
Suggested Users	5	5
Maximum 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)	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)
Notes	The suggested maximum number of users is based on the following workload: 20% of users randomly perform file operations (upload, download, move, and delete), and 80% of users are logged in but idle. Learn more Models with SSD support are tested with a single SSD volume. Exceeding the recommended numbers above will not block application operations, but may result in longer response time. Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.	The suggested maximum number of users is based on the following workload: 20% of users randomly perform file operations (upload, download, move, and delete), and 80% of users are logged in but idle. Learn more Models with SSD support are tested with a single SSD volume. Exceeding the recommended numbers above will not block application operations, but may result in longer response time. Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
Synology Office
Suggested Users	5	5
Notes	The suggested maximum number of users is based on the following workload: 20% of users are executing random actions at an average of 30-second intervals, and 80% of users are logged in and viewing a file. Learn more Models with SSD support are tested with a single SSD volume. Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM	The suggested maximum number of users is based on the following workload: 20% of users are executing random actions at an average of 30-second intervals, and 80% of users are logged in and viewing a file. Learn more Models with SSD support are tested with a single SSD volume. Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
VPN Server
Maximum Connections	2	2

Hardware Specs

Hardware Specifications

CPU

CPU Model

DS223	Realtek RTD1619B
DS423	Realtek RTD1619B

CPU Quantity

DS223	1
DS423	1

CPU Core

DS223	4
DS423	4

CPU Architecture

DS223	64-bit
DS423	64-bit

CPU Frequency

DS223	1.7 GHz
DS423	1.7 GHz

Hardware Encryption Engine

Memory

System Memory

DS223	2 GB DDR4 non-ECC
DS423	2 GB DDR4 non-ECC

Notes

DS223	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.
DS423	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

DS223	2
DS423	4

Drive Type (See all supported drives)

DS223	3.5" SATA HDD 2.5" SATA SSD
DS423	3.5" SATA HDD 2.5" SATA SSD

Hot Swappable Drive*

External Ports

RJ-45 1GbE LAN Port

DS223	1
DS423	2

USB 3.2 Gen 1 Port

DS223	3
DS423	2

USB Copy

Notes

DS223	MTU value of 1GbE LAN port has a limit of 1500.
DS423	MTU value of 1GbE LAN port has a limit of 1500.

Appearance

Size (Height x Width x Depth)

DS223	165 mm x 108 mm x 232.7 mm
DS423	184 mm x 168 mm x 230 mm

Weight

DS223	1.28 kg
DS423	2.21 kg

Others

System Fan

DS223	92 mm x 92 mm x 1 pcs
DS423	80 mm x 80 mm x 2 pcs

Fan Speed Mode

DS223	Full-Speed Mode Cool Mode Quiet Mode
DS423	Full-Speed Mode Cool Mode Quiet Mode

Brightness Adjustable Front LED Indicators

Power Recovery

Noise Level*

DS223	14.6 dB(A)
DS423	20.6 dB(A)

Scheduled Power On / Off

Wake on LAN / WAN

Power Supply Unit / Adapter

DS223	60 watts
DS423	90 watts

AC Input Power Voltage

DS223	100V to 240V AC
DS423	100V to 240V AC

Power Frequency

DS223	50/60 Hz, Single Phase
DS423	50/60 Hz, Single Phase

Power Consumption*

DS223	17.343 watts (Access) 4.08 watts (HDD Hibernation)
DS423	32.41 watts (Access) 4.97 watts (HDD Hibernation)

British Thermal Unit

DS223	59.19 BTU/hr (Access) 13.92 BTU/hr (HDD Hibernation)
DS423	110.52 BTU/hr (Access) 16.95 BTU/hr (HDD Hibernation)

Notes

DS223	For more information on how power consumption is measured, refer to this article. Noise testing was conducted with the Synology system fully installed with Synology SATA SSDs and in an idle state. Two GRAS 40AE microphones were placed at a 1 m distance from the front and rear of the device. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%.
DS423	For more information on how power consumption is measured, refer to this article. 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

DS223	0°C to 40°C (32°F to 104°F)
DS423	0°C to 40°C (32°F to 104°F)

Storage Temperature

DS223	-20°C to 60°C (-5°F to 140°F)
DS423	-20°C to 60°C (-5°F to 140°F)

Operating humidity

DS223	8% to 80% RH
DS423	8% to 80% RH

Storage Humidity

DS223	5% to 95% RH
DS423	5% to 95% RH

Certification

DS223	FCC CE BSMI VCCI RCM UKCA EAC CCC KC BIS
DS423	FCC CE BSMI VCCI RCM UKCA EAC CCC KC BIS

Warranty

DS223	2-year hardware warranty, extendable to 4 years with Extended Warranty Plus
DS423	2-year hardware warranty, extendable to 4 years with Extended Warranty Plus

Notes

DS223	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) Extended Warranty Plus is only available in Europe and North America. Refer to the Extended Warranty Plus website for details on supported countries/regions. (Learn more)
DS423	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) Extended Warranty Plus is only available in Europe and North America. Refer to the Extended Warranty Plus website for details on supported countries/regions. (Learn more)

Environment

DS223	RoHS Compliant
DS423	RoHS Compliant

Packaging Content

DS223	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
DS423	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

Optional Accessories

DS223	Enterprise Series 3.5" SATA HDD: HAT5300 Series Plus Series 3.5" SATA HDD: HAT3300 Series Enterprise Series 2.5" SATA SSD: SAT5200 Series
DS423	Enterprise Series 3.5" SATA HDD: HAT5300 Series Plus Series 3.5" SATA HDD: HAT3300 Series Enterprise Series 2.5" SATA SSD: SAT5200 Series

Software Specs

DSM Specifications

Storage Management

Maximum Single Volume Size

DS223	108 TB
DS423	108 TB

Maximum Internal Volume Number

DS223	64
DS423	64

SSD TRIM

Supported RAID Type

DS223	Synology Hybrid RAID Basic JBOD RAID 0 RAID 1
DS423	Synology Hybrid RAID Basic JBOD RAID 0 RAID 1 RAID 5 RAID 6 RAID 10

RAID Migration

DS223	Basic to RAID 1
DS423	Basic to RAID 1 Basic to RAID 5 RAID 1 to RAID 5 RAID 5 to RAID 6

Volume Expansion with Larger HDDs

Volume Expansion by Adding a HDD

Global Hot Spare Supported RAID Type

Notes

DS223	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.
DS423	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.

File System

Internal Drives

External Drives

File Services

File Protocol

Maximum Number of SMB Connections (FSCT-Based)

Windows Access Control List (ACL) Integration

NFS Kerberos Authentication

Notes

DS223

Connection value of this model is tested with Synology SATA HDD fully populated and all onboard network ports
SMB performance was evaluated using Microsoft File Server Capacity Tool (FSCT) version 1.3, with the following configuration:
- Test workload: HomeFolder scenario provided by the FSCT tool
- Test duration: 600 seconds
- Domain controller & FSCT controller: Windows Server 2022
- FSCT clients: 8 × Windows 10 machines
- SMB feature: Directory leasing enabled

DS423

Connection value of this model is tested with Synology SATA HDD fully populated and all onboard network ports
SMB performance was evaluated using Microsoft File Server Capacity Tool (FSCT) version 1.3, with the following configuration:
- Test workload: HomeFolder scenario provided by the FSCT tool
- Test duration: 600 seconds
- Domain controller & FSCT controller: Windows Server 2022
- FSCT clients: 8 × Windows 10 machines
- SMB feature: Directory leasing enabled

Account & Shared Folder

Maximum Local User Accounts

Maximum Local Groups

Maximum Shared Folder

Maximum Shared Folder Sync Tasks

Hyper Backup

Folder and Package Backup

Log Center

DS223
DS423

Syslog Events per Second

General Specifications

Supported Protocols

DS223	SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
DS423	SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV

Supported Browsers

Supported Language

DS223	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
DS423	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

DS223	For an updated list of supported browser versions, check the DSM Technical Specifications.
DS423	For an updated list of supported browser versions, check the DSM Technical Specifications.

Add-on Packages view the complete package list

Synology Chat

Download Station

DS223
DS423

Maximum Concurrent Download Tasks

SAN Manager

DS223
DS423

Maximum iSCSI Target Number

Maximum LUN

LUN Clone/Snapshot, Windows ODX

Media Server

DS223
DS423

DLNA Compliance

Synology Photos

DS223
DS423

Facial Recognition

Snapshot Replication

DS223
DS423

Maximum Snapshots per Shared Folder

Maximum of System Snapshots

Surveillance Station

DS223
DS423

Default Licenses

DS223	2 (Additional cameras require purchase of licenses)
DS423	2 (Additional cameras require purchase of licenses)

Suggested Maximum IP Cameras and Total FPS (H.264)

DS223	1080p: 20 channels, 460 FPS 3M: 20 channels, 300 FPS 5M: 15 channels, 150 FPS 4K: 11 channels, 110 FPS
DS423	1080p: 30 channels, 600 FPS 3M: 30 channels, 300 FPS 5M: 20 channels, 200 FPS 4K: 15 channels, 150 FPS

Suggested Maximum IP Cameras and Total FPS (H.265)

DS223	1080p: 20 channels, 500 FPS 3M: 20 channels, 400 FPS 5M: 20 channels, 350 FPS 4K: 20 channels, 200 FPS
DS423	1080p: 30 channels, 800 FPS 3M: 30 channels, 500 FPS 5M: 30 channels, 450 FPS 4K: 20 channels, 200 FPS

Notes

DS223

Performance figures are obtained from testing conducted with the device fully populated with drives, with their default memory configuration, and under a continuous recording setup. Actual system capabilities may vary based on configuration, drive performance, enabled features, and the presence of additional workloads.
Use NVR Selector to quickly find a suitable model based on your requirements.
The number of streams that can be viewed simultaneously is twice the suggested maximum number of cameras. For example, if the suggested maximum number of cameras for a model is 10 under H.264, 1080p, the model can support up to 20 streams of the same specification at the same time.

DS423

Performance figures are obtained from testing conducted with the device fully populated with drives, with their default memory configuration, and under a continuous recording setup. Actual system capabilities may vary based on configuration, drive performance, enabled features, and the presence of additional workloads.
Use NVR Selector to quickly find a suitable model based on your requirements.
The number of streams that can be viewed simultaneously is twice the suggested maximum number of cameras. For example, if the suggested maximum number of cameras for a model is 10 under H.264, 1080p, the model can support up to 20 streams of the same specification at the same time.

Synology Drive

DS223
DS423

Suggested Users

Maximum Number of Hosted Files

DS223	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)
DS423	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)

Notes

DS223

The suggested maximum number of users is based on the following workload: 20% of users randomly perform file operations (upload, download, move, and delete), and 80% of users are logged in but idle. Learn more
Models with SSD support are tested with a single SSD volume.
Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.

DS423

The suggested maximum number of users is based on the following workload: 20% of users randomly perform file operations (upload, download, move, and delete), and 80% of users are logged in but idle. Learn more
Models with SSD support are tested with a single SSD volume.
Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.

Synology Office

DS223
DS423

Suggested Users

Notes

DS223

The suggested maximum number of users is based on the following workload: 20% of users are executing random actions at an average of 30-second intervals, and 80% of users are logged in and viewing a file. Learn more
Models with SSD support are tested with a single SSD volume.
Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM

DS423

The suggested maximum number of users is based on the following workload: 20% of users are executing random actions at an average of 30-second intervals, and 80% of users are logged in and viewing a file. Learn more
Models with SSD support are tested with a single SSD volume.
Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM

VPN Server

DS223
DS423

Maximum Connections