Conquer home office data chaos
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Capable and compact - Powerful functionality packed into a 4-bay chassis
Consolidate and share - Store, organize, and share up to 80 TB of data.
Integrated data protection - Contains hardware and software safeguards engineered to protect your data — trusted by millions.
A capable all-around performer
The versatile DS423+ can serve as a central storage device as well as a multimedia hub.
The DS423+ achieves over 226 MB/s read and 224 MB/s write speeds
Up to226/224 MB/sread/write1
It features two M.2 NVMe slots for caching and includes two 1GbE LAN ports
2 x M.2NVMeSSD slots2
2 x1GbELAN ports
Btrfs: advanced file system for data protection
The Synology DiskStation Manager (DSM) operating system that powers DS423+ uses the advanced Btrfs file system, which safeguards your data against corruption and allows for the reversal of any unintended or malicious changes through the use of snapshot technology. Learn more
Store, share, and protect
Manage all your documents, photos, and other files, back up applications and devices, and protect your physical assets with professional video surveillance.
Private cloud for seamless data access
A private cloud for all your devices
Store, sync, access, and share data from any device, wherever you are. Work seamlessly between different platforms and devices, and access your files through mobile apps, desktop clients, and a browser-based interface. Quickly and easily roll back files in case of accidental deletion, mistakes, malware, etc., with the versioning feature. Learn more
Keep your photos organized
Effortlessly keep multiple Synology NAS in sync
Share data with the power of the cloud
Multi-layered backup
Back up PCs, smartphones, cloud apps, and more
Consolidate and automate backup tasks for PCs, file servers, VMs, SaaS applications, and more with Active Backup Suite. Administer device backups remotely through a centralized portal and quickly restore specific files or entire devices to keep your business up and running. Take advantage of built-in remote backup solutions designed to protect your data with seamless 3-2-1 backup configurations. Learn more
Perform full Synology system backups
Protect folders and LUNs with snapshots
Smart surveillance
Synology Surveillance Station
Protecting your business has never been easier, with centralized management, support for over 8,300 IP camera models, and remote monitoring and playback. Synology’s video management system provides all the tools you need for live monitoring, investigation, management, and backup.4Learn more
Dual recording to the cloud
Performance backed by Synology drives
Leverage high sustained performance and reliability with enterprise-grade drives and built-in data protection designed for Synology systems.5
HDD
Enterprise Series 3.5" SATAPlus Series 3.5" SATA
SSD
Enterprise Series 2.5" SATAEnterprise Series M.2 NVMe
Get more with DiskStation Manager
Take advantage of a host of native productivity, management, and security solutions available in the web-based Synology DSM operating system.
Central Management System
Conveniently manage your fleet of Synology NAS from a centralized console.
Learn more
Security
Shield your Synology NAS from the most sophisticated threats with industry-leading security solutions.
Learn more
Synology High Availability
Seamless transition between clustered servers in the event of a server failure to minimize the impact on applications.
Learn more
- 1Status Indicator
- 2Drive Status Indicators
- 3Memory Expansion Slot
- 4Drive Tray Locks
- 5USB 3.2 Gen 1 Port
- 6Power Button
- 7Drive Trays
- 81GbE RJ-45 Ports
- 9Reset Button
- 10USB 3.2 Gen 1 Port
- 11Power Port
- 12Fans
- 13Kensington Security Slot
- 14M.2 NVMe SSD Slots
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Hardware Specifications
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CPU
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CPU Model |
Intel Celeron J4125 |
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CPU Quantity |
1 |
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CPU Core |
4 |
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CPU Architecture |
64-bit |
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CPU Frequency |
2.0 (base) / 2.7 (turbo) GHz |
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Hardware Encryption Engine |
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Memory
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System Memory |
2 GB DDR4 non-ECC |
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Total Memory Slots |
1 |
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Maximum Memory Capacity |
6 GB (2 GB + 4 GB) |
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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.
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Storage
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Drive Bays |
4 |
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M.2 Drive Slots |
2 (NVMe) |
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Compatible Drive Type* (See all supported drives) |
- 3.5" SATA HDD
- 2.5" SATA SSD
- M.2 2280 NVMe SSD
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Hot Swappable Drive* |
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Notes |
- The hot swappable drive feature is not supported by M.2 SSD slots.
- "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.
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External Ports
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RJ-45 1GbE LAN Port |
2 |
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USB 3.2 Gen 1 Port* |
2 |
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Notes |
- This device's 1GbE LAN ports have a maximum transmission unit (MTU) size of 1,500 bytes.
- The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019.
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Appearance
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Size (Height x Width x Depth) |
166 mm x 199 mm x 223 mm |
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Weight |
2.18 kg |
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Others
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System Fan |
92 mm x 92 mm x 2 pcs |
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Fan Speed Mode |
- Full-Speed Mode
- Cool Mode
- Quiet Mode
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Brightness Adjustable Front LED Indicators |
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Power Recovery |
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Noise Level* |
19.8 dB(A) |
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Scheduled Power On / Off |
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Wake on LAN / WAN |
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Power Supply Unit / Adapter |
90 watts |
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AC Input Power Voltage |
100V to 240V AC |
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Power Frequency |
50/60 Hz, Single Phase |
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Power Consumption |
28.3 watts (Access)
8.45 watts (HDD Hibernation) |
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British Thermal Unit |
96.5 BTU/hr (Access)
28.81 BTU/hr (HDD Hibernation) |
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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 HDDs and in an idle stae. Two G.R.A.S. Type 40AE microphones are 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%
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Temperature
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Operating Temperature |
0°C to 40°C (32°F to 104°F) |
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Storage Temperature |
-20°C to 60°C (-5°F to 140°F) |
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Relative Humidity |
5% to 95% RH |
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Certification
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- FCC
- CE
- BSMI
- VCCI
- RCM
- UKCA
- EAC
- CCC
- KC
- BIS
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Warranty
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3-year hardware warranty, extendable to 5 years with EW201 |
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Notes |
- The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
- EW201/EW202 is only available in Asia, Africa, and Oceania. Refer to the Extended Warranty website for details on supported countries/regions. (Learn more)
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Environment
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RoHS Compliant |
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Packaging Content
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- 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
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Optional Accessories
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Notes |
All memory modules will operate at the maximum frequency specified by the CPU manufacturer. |
Notes:
- Model specifications are subject to change without prior notice.
- The figures are based on Synology internal testing. Each performance test is done individually. No other services or applications are processed at the same time.
- The actual performance may be lower than lab testing figure due to differences in server configuration, deployment, and the number of active operations.
SOFTWARE SPECIFICATION
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DSM Specifications
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Maximum Single Volume Size |
108 TB |
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Maximum Internal Volume Number |
64 |
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M.2 SSD Storage Pool Support* |
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SSD Read/Write Cache (Determining cache size) |
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SSD TRIM |
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Supported RAID Type |
- Synology Hybrid RAID
- Basic
- JBOD
- RAID 0
- RAID 1
- RAID 5
- RAID 6
- RAID 10
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RAID Migration |
- Basic to RAID 1
- Basic to RAID 5
- RAID 1 to RAID 5
- RAID 5 to RAID 6
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Volume Expansion with Larger HDDs |
- Synology Hybrid RAID
- RAID 1
- RAID 5
- RAID 6
- RAID 10
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Volume Expansion by Adding a HDD |
- Synology Hybrid RAID
- JBOD
- RAID 5
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Global Hot Spare Supported RAID Type |
- Synology Hybrid RAID
- RAID 1
- RAID 5
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Notes |
- Creating M.2 storage pools requires the use of Synology-verified SSDs, which are rigorously tested under extreme temperature conditions. Thermal parameters for SSDs and NAS units are fine-tuned to ensure optimal management of thermal conditions under I/O-intensive environments. (Learn more)
- 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 depend on drive sizes used, the number of drive bays available, and the RAID configuration.
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Internal Drives |
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External Drives |
- Btrfs
- ext4
- ext3
- FAT
- NTFS
- HFS+
- exFAT
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File Protocol |
- SMB
- AFP
- NFS
- FTP
- WebDAV
- Rsync
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Maximum Concurrent SMB/AFP/FTP Connections |
500 |
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Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion) |
1,500 |
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Windows Access Control List (ACL) Integration |
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NFS Kerberos Authentication |
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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.
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Maximum Local User Accounts |
2,048 |
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Maximum Local Groups |
256 |
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Maximum Shared Folder |
512 |
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Maximum Shared Folder Sync Tasks |
8 |
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Hybrid Share Folder Number |
10 |
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Data & Folder Backup |
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Entire System Backup |
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Notes |
Full-system backup requires DSM 7.2 or later. |
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Synology High Availability |
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Syslog Events per Second |
800 |
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Virtualization
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VMware ESXi 6.5 and VAAI |
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Windows Server 2022 |
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Citrix Ready |
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OpenStack |
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Supported Protocols |
SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV |
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Supported Browsers |
- Chrome
- Firefox
- Edge
- Safari
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Supported Language |
English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, ???????, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Ceský, ???????, ???, ???, ????, ???? |
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Notes |
For an updated list of supported browser versions, check the DSM Technical Specifications. |
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Suggested Users |
100 |
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Notes |
- Measured with simulated users, each with an average record of 20,000 messages, emojis, or stickers. The required server response time is below ten seconds.
- Models with expandable memory are tested with their maximum supported memory.
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Download Station
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Maximum Concurrent Download Tasks |
80 |
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Maximum iSCSI Target Number |
128 |
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Maximum LUN |
256 |
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LUN Clone/Snapshot, Windows ODX |
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Free Email Accounts |
5 (Additional accounts require purchase of licenses) |
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Suggested Users |
500 |
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Notes |
- Suggested users is derived from testing in an environment with 20% heavy users (each with 20,000 pre-populated emails and receiving 240 emails per day) and 80% light users (each receiving an average of 20 emails per day). Learn more
- Models with expandable memory are tested with their maximum supported memory. To estimate the RAM requirement for your NAS, please read this article.
- 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).
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DLNA Compliance |
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Facial Recognition |
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Object Recognition |
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Notes |
Object recognition requires an upgrade of memory capacity to a minimum of 4 GB. |
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Maximum Snapshots per Shared Folder |
1,024 |
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Maximum of System Snapshots |
65,536 |
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Default Licenses |
2 (Additional cameras require purchase of licenses) |
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Suggested Maximum IP Cameras and Total FPS (H.264) |
- 1080p: 40 channels, 800 FPS
- 3M: 35 channels, 350 FPS
- 5M: 28 channels, 280 FPS
- 4K: 17 channels, 170 FPS
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Suggested Maximum IP Cameras and Total FPS (H.265) |
- 1080p: 40 channels, 1200 FPS
- 3M: 40 channels, 600 FPS
- 5M: 40 channels, 480 FPS
- 4K: 20 channels, 200 FPS
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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.
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Recommended Number of Concurrent Sync Clients |
350 (the number of connections that can be maintained when the recommended number of hosted files was reached) |
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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) |
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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.
- Models with expandable memory are tested with their maximum supported memory.
- Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
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Suggested Users |
3,000 |
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Notes |
- Suggested users is derived from testing in an environment with 60% idle users (each logging in and viewing documents) and 40% active users (each executing random actions at intervals of 20 to 40 seconds) operating within documents, each document having 30 users. Learn more
- Models with expandable memory are tested with their maximum supported memory.
- Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
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Recommended Virtual Machine Instances |
2 (Learn more) |
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Recommended Virtual DSM Number (Licenses required) |
2 (including 1 Free License) |
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Notes |
The specifications vary depending on system configuration and memory size. |
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Maximum Connections |
40 |
Notes:
- Model specifications are subject to change without prior notice.
- The figures are based on Synology internal testing. Each performance test is done individually. No other services or applications are processed at the same time.
- The actual performance may be lower than lab testing figure due to differences in server configuration, deployment, and the number of active operations.