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DS420J
DiskStation DS420J - NAS - Compact - Realtek - RTD1296 - Bla...
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DS420J is a cost‐effective NAS solution featuring 4 drive bays that support both SATA HDD and SATA SSD types. It delivers a total storage capacity of up to 64 TB and offers flexible RAID options including RAID 0, RAID 1, RAID 5, RAID 10, and JBOD for data protection and performance. Powered by a Realtek quad‐core processor and equipped with 1 GB DDR4 memory, DS420J ensures reliable everyday operations without any unnecessary frills.
DS420J comes with a Gigabit Ethernet interface and two USB 3.0 ports, making it an ideal choice for home backup, SMB environments, media serving, and surveillance applications. The system features active cooling, a single non-redundant power supply, and hot-swap drive bays to maximize uptime and accessibility in small office or home settings.
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| DS420J |  DS418 |  DX517 |  RS3621RPXS |  RXD1219SAS | |
|---|---|---|---|---|---|
| Product Type | Storage System | Storage System | Storage System | Storage System | Storage System |
| Storage Type | NAS | NAS | SAN | SAN | SAN |
| Form Factor | Desktop | Desktop | Rackmount | Rackmount | Rackmount |
| Bay Count | 4-bay | 4-bay | 12-bay | 24-bay | 12-bay |
| Supported Drive Types | SATA HDD / SATA SSD | SATA HDD / SATA SSD | Mixed | Mixed | Mixed |
| Hot-Swap Support | Yes | Yes | Yes | Yes | Yes |
| Max Supported Capacity | 64 TB | 64 TB | 512 TB | 256 TB | 512 TB |
| RAID Support | RAID 0 / RAID 1 / RAID 5 / RAID 10 / JBOD | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 / JBOD | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 / RAID 50 / RAID 60 / JBOD | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 |
| CPU Type | Realtek | Realtek | Intel Xeon | Intel Xeon | Intel Xeon |
| CPU Cores | 4 | 4 | 8 | 8 | 8 |
| Installed RAM | 1 GB | 2 GB | 16 GB | 16 GB | 16 GB |
| Max RAM Capacity | 1 GB | 2 GB | 128 GB | 64 GB | 64 GB |
| RAM Type | DDR4 | DDR4 | ECC DDR4 | ECC DDR4 | ECC DDR4 |
| Network Ports | 1GbE | 1GbE | 10GbE | 10GbE | 10GbE |
| LAN Ports | 1 | 2 | 4 | 2 | 4 |
| USB Ports | USB 3.0 | USB 3.0 | USB 3.2 | USB 3.2 | USB 3.0 |
| Expansion Support | No | No | Yes | Yes | Yes |
| Cooling | Active | Active | Active | Redundant Fan | Redundant Fan |
| Power Supply | Single | Single | Redundant | Redundant | Redundant |
| Power Supply Wattage | N/A | N/A | 500W | 750W | 350W |
| Operating System | DSM | DSM | Custom OS | QTS | Custom OS |
| Snapshot Support | No | Yes | Yes | Yes | Yes |
| Cloud Sync Support | Yes | Yes | Yes | Yes | Yes |
| Virtualization Ready | No | Yes | Yes | Yes | Yes |
| iSCSI Support | Yes | Yes | Yes | Yes | Yes |
| Surveillance Support | Yes | Yes | No | Yes | No |
| Use Case | Home Backup | SMB / Media Server / Virtualization | Enterprise Data Center | Enterprise Data Center | Enterprise Data Center |
| Product Name | Synology DiskStation DS420J | Synology DiskStation DS418 | DX517 | QNAP Enterprise Storage Server RS3621RPXS | RXD1219SAS Enterprise Storage Array |
| Height | 9.13 inches | 9.1 inches | 4 inches | 3.5 inches | 3.5 inches |
| Width | 4.17 inches | 6.5 inches | 17 inches | 19 inches | 17 inches |
| Depth | 6.54 inches | 8.8 inches | 28 inches | 29 inches | 28 inches |
| Weight | 4.8 lbs | 4.5 lbs | 50 lbs | 70 lbs | 45 lbs |
Reliable 4-bay entry-level NAS. Perfect for high-capacity file sharing and basic backups with a very quiet operation.
Consistent performance and easy management. The DS420j is a cost-effective solution for small offices needing large network storage.
Excellent value and user-friendly interface. It provides a stable and efficient platform for our 4-bay document management needs.
Robust and efficient 4-bay storage. It offers reliable performance for standard tasks and easy cloud storage integration.
Professional grade reliability in a compact design. A dependable choice for businesses requiring straightforward and accessible 4-bay storage.
Top-tier entry-level NAS for small teams. It delivers consistent speed and the reliable 4-bay protection our office requires.
Trustworthy performance for 4-bay networking. The DS420j provides a solid and reliable way to centralize large datasets.
The DS420J is a 4-bay compact NAS powered by a quad-core Realtek RTD1296 CPU with 1 GB DDR4 memory, offering centralized file storage, multimedia management, and secure remote access via Synology DiskStation Manager (DSM).
It supports up to four 3.5" or 2.5" SATA HDDs/SSDs, enabling a maximum raw capacity of 64 TB (16 TB per drive).
The DS420J features a quad-core Realtek RTD1296 1.4 GHz processor and 1 GB of non-expandable DDR4 memory for efficient multitasking.
In RAID 5 with optimized network settings, the DS420J delivers up to 225 MB/s sequential read and write speeds.
Yes. It supports both 3.5" and 2.5" SATA HDDs and SSDs for flexible storage configurations and tiered performance.
The DS420J supports RAID 0, 1, 5, 6, 10, BASIC, JBOD, and Synology Hybrid RAID (SHR) to balance performance and data protection.
It consumes as low as 17.13 W during active use and 6.84 W in HDD hibernation, delivering reliable performance with minimal power draw.
Yes. The DS420J comes preinstalled with DSM, Synology’s intuitive web-based OS, offering package management, updates, and a secure interface.
Yes. DSM’s QuickConnect and Synology DDNS services enable secure remote access to your files and applications from any Internet-connected device.
It includes Hyper Backup for multi-version local and cloud backups, Active Backup for Business, and Cloud Sync for real-time data replication.
Yes. It supports DLNA, Plex®, and Synology Video Station for streaming photos, music, and videos to smart TVs, computers, and mobile devices.
Yes. DS file, DS video, DS audio, and DS photo apps on iOS and Android let you manage files and stream media on the go.
The DS420J offers AES 256-bit encryption, two-step verification, IP blocking, auto-block against brute-force attacks, and malware protection.
Synology provides a two-year limited warranty with an optional extension up to five years, plus access to online resources and dedicated technical support.
Installation is tool-free: insert drives, connect LAN and power cables, then launch the web assistant to install DSM within minutes.
Memory is fixed at 1 GB DDR4, but storage can be expanded by replacing drives with higher-capacity units or attaching external USB drives via two USB 3.0 ports.
United States