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Synology 4 bay NAS DS420j (Diskless), 4-bay; 1GB DDR4
Synology 4 bay NAS DS420j (Diskless), 4-bay; 1GB DDR4
4-bay home NAS with over 60 TB raw capacity support suitable for data backup and file sharing
64-bit 4-core 1 4 GHz processor and 1 GB DDR4 memory
Over 112 MB/s encrypted sequential reading and writing throughput
Easy-to-deploy surveillance solution that supports up to 16 IP cameras
Energy-saving design with only 7 88 W consumed in hibernation mode
Synology 4 bay NAS DS420j (Diskless), 4-bay; 1GB DDR4
An essential entry-level NAS for your home
Build a private cloud for your home
Synology 4 bay NAS DS420j (Diskless), 4-bay; 1GB DDR4 NAS is designed for home data backup, file syncing, and sharing. Supporting up to 64 TB raw capacity, you can easily centralize all your multimedia collections.
- Hardware Specs
- Software Specs
CPU |
CPU Model | Realtek RTD1296 |
|---|---|---|
| CPU Quantity | 1 | |
| CPU Architecture | 64-bit | |
| CPU Frequency | 4-core 1.4 GHz | |
| Hardware Encryption Engine | ||
Memory |
System Memory | 1 GB DDR4 non-ECC |
| Synology 4 bay NAS DS420j | 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. |
Storage |
Drive Bays | 4 |
| Compatible Drive Type* (See all supported drives) |
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| Maximum Single Volume Size* | 108 TB | |
| Hot Swappable Drive | – | |
| Synology 4 bay NAS DS420j | 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. |
External Ports |
RJ-45 1GbE LAN Port | 1 |
| USB 3.2 Gen 1 Port* | 2 | |
| Notes | The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019. | |
File System |
Internal Drives |
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| Synology 4 bay NAS DS420j | External Drives |
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Appearance |
Size (Height x Width x Depth) | 184 mm x 168 mm x 230 mm |
| Weight | 2.21 kg | |
Others |
System Fan | 80 mm x 80 mm x 2 pcs |
| Synology 4 bay NAS DS420j | Fan Speed Mode |
|
| Brightness Adjustable Front LED Indicators | ||
| Power Recovery | ||
| Noise Level* | 20.6 dB(A) | |
| Scheduled Power On / Off | ||
| Wake on LAN / WAN | ||
| 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) |
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| Synology 4 bay NAS DS420j | Notes |
|
Temperature |
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 | |
Certification |
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Warranty |
2 Years | |
| Notes | The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) | |
Environment |
RoHS Compliant | |
Packaging Content |
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Optional Accessories |
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Synology 4 bay NAS DS420j SM Specifications |
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|---|---|---|
Storage Management |
Maximum Internal Volume Number | 64 |
| SSD TRIM | ||
| Synology 4 bay NAS DS420j | Supported RAID Type |
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| RAID Migration |
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| Volume Expansion with Larger HDDs |
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| Synology 4 bay NAS DS420j | Volume Expansion by Adding a HDD |
|
| Global Hot Spare Supported RAID Type |
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File Services |
File Protocol | SMB/AFP/NFS/FTP/WebDAV |
| Maximum Concurrent SMB/AFP/FTP Connections | 100 | |
| Windows Access Control List (ACL) Integration | ||
| NFS Kerberos Authentication | ||
| Synology 4 bay NAS DS420j | Notes | 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. |
Account & Shared Folder |
Maximum Local User Accounts | 1,024 |
| Maximum Local Groups | 256 | |
| Maximum Shared Folder | 256 | |
| Maximum Shared Folder Sync Tasks | 4 | |
Log Center |
Syslog Events per Second | 200 |
General Specifications |
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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| Synology 4 bay NAS DS420j | 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 DSM Technical Specifications. | |
Add-on Packages view the complete package list |
||
Synology Chat |
Maximum Users | 10 |
| Notes | The number of concurrent HTTP connections for Synology Chat was configured to the maximum. | |
Download Station |
Maximum Concurrent Download Tasks | 80 |
SAN Manager |
Maximum iSCSI Target Number | 10 |
| Maximum LUN | 10 | |
| Notes | iSCSI Manager has been renamed to SAN Manager in DSM 7.0. | |
Media Server |
DLNA Compliance | |
Synology Photos |
Facial Recognition | |
| Notes | Photo Station and Synology Moments are succeeded by Synology Photos in DSM 7.0. For a features comparison, check this article. | |
Surveillance Station |
Maximum IP cam (Licenses required) | 16 (including 2 Free License) (See All Supported IP Cameras) |
| Synology 4 bay NAS DS420j | Total FPS (H.264) | 480 FPS @ 720p (1280×720) 288 FPS @ 1080p (1920×1080) 150 FPS @ 3M (2048×1536) 100 FPS @ 5M (2591×1944) 70 FPS @ 4K (3840×2160) |
| Total FPS (H.265) | 480 FPS @ 720p (1280×720) 384 FPS @ 1080p (1920×1080) 256 FPS @ 3M (2048×1536) 160 FPS @ 5M (2591×1944) 100 FPS @ 4K (3840×2160) |
|
| Total FPS (MJPEG) | 240 FPS @ 720p (1280×720) 150 FPS @ 1080p (1920×1080) 100 FPS @ 3M (2048×1536) 60 FPS @ 5M (2591×1944) |
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| Synology 4 bay NAS DS420j | Notes |
|
Synology Drive |
Recommended Number of Hosted Files | 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) | |
| Synology 4 bay NAS DS420j | Notes |
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Synology Office |
Maximum Users | 200 |
| Notes |
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Video Station |
Video Transcoding | Group 2 (See more) |
VPN Server |
Maximum Connections | 10 |
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 the lab testing figure due to differences in server configuration, deployment, and the number of active operations.
- If usage requirements exceed the specifications above, please contact our regional partners for professional advice.
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