Find anything you need
Powerful functionality packed into a 4-bay chassis
Store, organize, and share up to 72 TB of data.
Contains hardware and software safeguards engineered to protect your data — trusted by millions.
The versatile DS423+ can serve as a central storage device as well as a multimedia hub.
Up to 226/224 MB/s read/write
2 x M.2 NVMe SSD slots
2 x 1GbE LAN ports
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.
Manage all your documents, photos, and other files, back up applications and devices, and protect your physical assets with professional video surveillance.
Leverage high sustained performance and reliability with enterprise-grade drives and built-in data protection designed for Synology systems.
Take advantage of a host of native productivity, management, and security solutions available in the web-based Synology DSM operating system.
Conveniently manage your fleet of Synology NAS from a centralized console.
Shield your Synology NAS from the most sophisticated threats with industry-leading security solutions.
Seamless transition between clustered servers in the event of a server failure to minimize the impact on applications.
Performance figures are obtained through internal testing by Synology. Actual performance may vary depending on the testing environment, usage, and configuration. See for more information.
Synology SNV3400 series M.2 NVMe SSD drives can be installed through the built-in M.2 slots to enable SSD caching or create SSD storage pools. Drives are sold separately.
C2 Storage for Hyper Backup and Hybrid Share requires purchase of an eligible annual or monthly subscription. A free trial is available for each newly registered Synology Account.
Surveillance Station includes 2 free licenses. Connecting more cameras and devices requires additional licenses.
PCIe add-in cards, expansion units, and storage drives are sold separately. Refer to the for compatible devices.
The warranty period starts from the date of purchase as stated on your purchase receipt. Visit for more information.
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Hardware Specifications
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CPU
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CPU
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CPU Model | Intel Celeron J4125 |
| CPU Quantity | 1 | |
| CPU Architecture | 64-bit | |
| CPU Frequency | 4-core 2.0 (base) / 2.7 (turbo) GHz | |
| Hardware Encryption Engine (AES-NI) | ||
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Memory
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Memory
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System Memory | 2 GB DDR4 non-ECC SODIMM |
| Total Memory Slots | 1 | |
| Maximum Memory Capacity | 6 GB (2 GB + 4 GB) | |
| Notes |
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Storage
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Storage
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Drive Bays | 4 |
| M.2 Drive Slots | 2 (NVMe) | |
| Compatible Drive Type* |
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| Hot Swappable Drive* | ||
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External Ports
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External Ports
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RJ-45 1GbE LAN Port* | 2 (with Link Aggregation / Failover support) |
| USB 3.2 Gen 1 Port* | 2 | |
| Notes |
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File System
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File System
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Internal Drives |
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| External Drives |
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Appearance
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Appearance
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Size (Height x Width x Depth) | 166 mm x 199 mm x 223 mm |
| Weight | 2.18 kg | |
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Others
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Others
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System Fan | 92 mm x 92 mm x 2 pcs |
| Fan Speed Mode |
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| Brightness Adjustable Front LED Indicators | ||
| Power Recovery | ||
| Noise Level* | 19.8 dB(A) | |
| Scheduled Power On / Off | ||
| Wake on LAN / WAN | ||
| Power Supply Unit / Adapter | 90 W | |
| AC Input Power Voltage | 100V to 240V AC | |
| Power Frequency | 50/60 Hz, Single Phase | |
| Power Consumption |
28.3 W (Access)
8.45 W (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 |
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Temperature
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Temperature
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Operating Temperature | 0°C to 40°C (32°F to 104°F) |
| Storage Temperature | -20°C to 60°C (-5°F to 140°F) | |
| Relative Humidity | 5% to 95% RH | |
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Certification
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Certification
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Warranty
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Warranty
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3-year hardware warranty, extendable to 5 years with or | |
| Notes |
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Environment
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Environment
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RoHS Compliant | |
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Packaging Content
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Packaging Content
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| Notes | All memory modules will operate at the maximum frequency specified by the CPU manufacturer. |
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DSM Specifications
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| Maximum Single Volume Size* | 108 TB | |
| Maximum Internal Volume Number | 64 | |
| M.2 SSD Storage Pool Support* | ||
| SSD Read / Write Cache | ||
| SSD TRIM | ||
| Supported RAID Type |
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| RAID Migration |
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| Volume Expansion with Larger HDDs |
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| Volume Expansion by Adding a HDD |
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| Global Hot Spare Supported RAID Type |
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| Notes |
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| File Protocol | SMB/AFP/NFS/FTP/WebDAV | |
| Maximum Concurrent SMB/AFP/FTP Connections | 500 | |
| Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion) | 1,500 | |
| Windows Access Control List (ACL) Integration | ||
| NFS Kerberos Authentication | ||
| Notes |
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| Maximum Local User Accounts | 2,048 | |
| Maximum Local Groups | 256 | |
| Maximum Shared Folder | 512 | |
| Maximum Shared Folder Sync Tasks | 8 | |
| Maximum Hybrid Share Folders | 10 | |
| Synology High Availability | ||
| Syslog Events per Second | 800 | |
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Virtualization
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Virtualization
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VMware vSphere with VAAI | |
| Windows Server 2016 | ||
| Windows Server 2019 | ||
| Citrix Ready | ||
| OpenStack | ||
| Networking Protocols | SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV | |
| Supported Browsers |
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| 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 | |
| Notes | For an updated list of supported browser versions, check the . | |
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Add-on Packages
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Antivirus by McAfee (Trial)
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Antivirus by McAfee (Trial)
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| Maximum Number of Concurrent Users | 100 | |
| Notes |
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Document Viewer
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Document Viewer
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Download Station
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Download Station
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Download Station
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Maximum Concurrent Download Tasks | 80 |
| Maximum iSCSI Target Number | 128 | |
| Maximum LUN | 256 | |
| LUN Clone/Snapshot, Windows ODX | ||
| Free Email Accounts | 5 | |
| Maximum Number of Concurrent Users | 100 | |
| Maximum Server Performance | 1,224,000 emails per day, approx. 37GB | |
| Notes |
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| DLNA Compliance | ||
| Facial Recognition | ||
| Maximum Snapshots per Shared Folder | 1,024 | |
| Maximum of System Snapshots | 65,536 | |
| Maximum IP cam | 40 (including 2 Free License) | |
| Total FPS (H.264) |
1200 FPS @ 720p (1280x720)
800 FPS @ 1080p (1920x1080) 350 FPS @ 3M (2048x1536) 280 FPS @ 5M (2591x1944) 170 FPS @ 4K (3840x2160) |
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| Total FPS (H.265) |
1200 FPS @ 720p (1280x720)
1200 FPS @ 1080p (1920x1080) 600 FPS @ 3M (2048x1536) 480 FPS @ 5M (2591x1944) 200 FPS @ 4K (3840x2160) |
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| Notes |
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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) | |
| Recommended Number of Hosted Files | 5,000,000 (applies to files indexed or hosted by . For file access through other standard protocols, refer to the File Services section above) | |
| Notes |
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| Maximum Users | 1,200 | |
| Notes |
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| Recommended Virtual Machine Instances | 2 | |
| Recommended Virtual DSM Number | 2 (including 1 Free License) | |
| Notes | The specifications vary depending on system configuration and memory size. | |
| Maximum Connections | 40 |
