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An essential entry-level NAS for your home
Build a private cloud for your home
DS420j is a 4-bay desktop NAS designed for home data backup, file syncing, and sharing. Supporting up to 64 TB raw capacity, you can easily centralize all your multimedia collections.
Manage your photo collections
Smartly organize your photos with Synology Moments, a modern, AI-enabled photo management application that allows you to preserve your precious memories effortlessly.
Stream content to your TV
Turn your Synology NAS into a home media hub and stream your digital contents to your favorite devices such as computers, mobile devices, Samsung TV, Apple TV, Google Chromecast, and DLNA devices.
Stream content to your TV
Turn your Synology NAS into a home media hub and stream your digital contents to your favorite devices such as computers, mobile devices, Samsung TV, Apple TV, Google Chromecast, and DLNA devices.
Cross-platform file syncing and sharing
Synology Drive allows you to sync files across Windows, macOS, Linux, and mobile devices, keeping everything up-to-date.
Reliable and efficient backup options
Synology Hyper Backup is a reliable and multi-directional backup solution offering data deduplication and compression. You can back up from various source folders, including external USB drives, another Synology NAS, rsync servers, or from public cloud services like Google Drive or Synology C2, and protect your data against malicious attacks and encryption-based ransomware threats.
| CPU Model | Realtek RTD1296 |
| CPU Architecture | 64-bit |
| CPU Frequency | Quad Core 1.4 GHz |
| Hardware Encryption Engine | Yes |
| System Memory | 1 GB DDR4 |
| 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. |
| Drive Bays | 4 |
| Compatible Drive Type |
|
| Maximum Internal Raw Capacity | 64 TB (16 TB drive x 4) (Capacity may vary by RAID types) |
| Maximum Single Volume Size* | 108 TB |
| Hot Swappable Drive | - |
| Notes |
|
| RJ-45 1GbE LAN Port | 1 |
| USB 3.0 Port | 2 |
| Internal Drives |
|
| External Drives |
|
| Notes | exFAT Access is purchased separately in Package Center. |
| Size (Height x Width x Depth) | 184 mm x 168 mm x 230 mm |
| Weight | 2.21 kg |
| System Fan | 80 mm x 80 mm x 2 pcs |
| Fan Speed Mode |
|
| Brightness Adjustable Front LED Indicators | Yes |
| Power Recovery | Yes |
| Noise Level* | 20.6 dB(A) |
| Scheduled Power On / Off | Yes |
| Wake on LAN / WAN | Yes |
| Power Supply Unit / Adapter | 90 W |
| AC Input Power Voltage | 100 V to 240 V AC |
| Power Frequency | 50/60 Hz, Single Phase |
| Power Consumption* |
21.71 W (Access) 7.88 W (HDD Hibernation) |
| British Thermal Unit |
74.08 BTU/hr (Access) 26.89 BTU/hr (HDD Hibernation) |
| Notes |
|
| 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 |
|
| 2 Years | |
| Notes | The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) |
| RoHS Compliant |
|
|
| Maximum Internal Volume Number | 64 |
| Maximum iSCSI Target Number | 10 |
| Maximum iSCSI LUN | 10 |
| SSD TRIM | Yes |
| Supported RAID Type |
|
| RAID Migration |
|
| Volume Expansion with Larger HDDs |
|
| Volume Expansion by Adding a HDD |
|
| Global Hot Spare Supported RAID Type |
|
| File Protocol | CIFS/AFP/NFS/FTP/WebDAV |
| Maximum Concurrent CIFS/AFP/FTP Connections | 100 |
| Windows Access Control List (ACL) Integration | Yes |
| NFS Kerberos Authentication | Yes |
| Maximum Local User Accounts | 1,024 |
| Maximum Local Groups | 256 |
| Maximum Shared Folder | 256 |
| Maximum Shared Folder Sync Tasks | 4 |
| Syslog Events per Second | 100 |
| Networking Protocols | SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV |
| Supported Browsers |
|
| Supported Language | English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, ???????, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Ceský, ???????, ???, ???, ????, ???? |
| Maximum Users | 10 |
| Notes |
|
| Maximum Concurrent Download Tasks | 80 |
| Yes |
| DLNA Compliance | Yes |
| Facial Recognition | Yes |
| Subject Recognition | Yes |
| Maximum IP cam | 16 (including 2 Free License) |
| Total FPS (H.264) |
480 FPS @ 720p (1280x720) 288 FPS @ 1080p (1920x1080) 150 FPS @ 3M (2048x1536) 100 FPS @ 5M (2591x1944) 70 FPS @ 4K (3840x2160) |
| Total FPS (H.265) |
480 FPS @ 720p (1280x720) 384 FPS @ 1080p (1920x1080) 256 FPS @ 3M (2048x1536) 160 FPS @ 5M (2591x1944) 100 FPS @ 4K (3840x2160) |
| Total FPS (MJPEG) |
240 FPS @ 720p (1280x720) 150 FPS @ 1080p (1920x1080) 100 FPS @ 3M (2048x1536) 60 FPS @ 5M (2591x1944) |
| Notes |
|
| 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) |
| Recommended Number of Concurrent Sync Clients | 200 (the number of connections that can be maintained when the recommended number of hosted files was reached) |
| Notes |
|
| Maximum Users | 200 |
| Notes |
|
| Video Transcoding | Group 2 |
| Maximum Connections | 10 |
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