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Synology DS420j An essential entry-level NAS for your home

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Synology DS420j An essential entry-level NAS for your home

CPU: Realtek RTD1296 Quad Core 1.4 GHz, RAM: 1GB DDR4, USB3.0 x2, Gigabit LAN x1, 2 Years Warranty

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DiskStation DS420j

An essential entry-level NAS for your home

Features

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.

Download Datasheet

CPU

64-bit 4-core 1.4 GHz

Performance

Over 112 MB/s encrypted reading and writing¹

Storage

Maximum 64 TB raw capacity

Energy-saving

7.88 W in hibernation mode

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. Learn more

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.

Seamless integration with your mobile devices

Synology mobile applications are designed to allow quick and secure access to your data wherever you are.

DS audio DS Photo DS video

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.

Sync files on demand: Save the storage space and network bandwidth of your PC.

Go back in time: Easily retrieve previous versions of your shared files.

Back up your data: Protect your files as scheduled or in real-time.

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. Learn more

Powered by Synology DSM

Multimedia

Complete multimedia solution for management, streaming, and playback.

Learn more

Desktop Backup

Simplified backup solution for your Mac, PC, and mobile devices.

Learn more

File Server/Management

Powerful built-in file management and sharing services.

Learn more

Synology Drive

A versatile solution for file management and synchronization.

Learn more

Hyper Backup

Store multiple backup versions with block-level incremental data backup and cross-version deduplication.

Learn more

Surveillance Station

Complete surveillance solution for recording, monitoring, and management.

Learn more

1 Status indicator
2 LAN indicator
3 Power button and indicator
4 Drive status indicator
5 1GbE RJ-45 port

6 Power port
7 Kensington Security Slot
8 Fan
9 USB 3.0 port
10 Reset button

Notes:

Performance figures may vary depending on environment, usage, and configuration.

Hardware Specifications

CPU	CPU Model	Realtek RTD1296
	CPU Architecture	64-bit
	CPU Frequency	Quad Core 1.4 GHz
	Hardware Encryption Engine
Memory	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.
Storage	Drive Bays	4
	Compatible Drive Type* (See all supported drives)	3.5" SATA HDD 2.5" SATA HDD 2.5" SATA SSD
	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	"Compatible drive type" indicates the drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay. The maximum single volume size is not directly related to the maximum raw capacity. (Learn more)
External Ports	RJ-45 1GbE LAN Port	1
	USB 3.0 Port	2
File System	Internal Drives	EXT4
	External Drives	EXT4 EXT3 FAT NTFS HFS+ exFAT*
	Notes	exFAT Access is purchased separately in Package Center.
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
	Fan Speed Mode	Full-Speed Mode Cool Mode Quiet Mode Low-power 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)
	Notes	Power consumption is measured when it's fully loaded with Western Digital 1TB WD10EFRX hard drive(s). Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%
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	FCC CE EAC BSMI VCCI CCC RCM
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	Main Unit X 1 Accessory Pack X 1 AC Power Adapter X 1 AC Power Cord X 1 RJ-45 LAN Cable X 1 Quick Installation Guide X 1
Optional Accessories	Surveillance Device License Pack VS360HD VS960HD

Software Specifications

DSM Specifications
Storage Management	Maximum Internal Volume Number	64
	Maximum iSCSI Target Number	10
	Maximum iSCSI LUN	10
	SSD TRIM
	Supported RAID Type	Synology Hybrid RAID Basic JBOD RAID 0 RAID 1 RAID 5 RAID 6 RAID 10
	RAID Migration	Basic to RAID 1 Basic to RAID 5 RAID 1 to RAID 5 RAID 5 to RAID 6
	Volume Expansion with Larger HDDs	Synology Hybrid RAID RAID 1 RAID 5 RAID 6 RAID 10
	Volume Expansion by Adding a HDD	Synology Hybrid RAID JBOD RAID 5
	Global Hot Spare Supported RAID Type	Synology Hybrid RAID RAID 1 RAID 5
File Services	File Protocol	CIFS/AFP/NFS/FTP/WebDAV
	Maximum Concurrent CIFS/AFP/FTP Connections	100
	Windows Access Control List (ACL) Integration
	NFS Kerberos Authentication
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	100
General Specifications	Networking Protocols	SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
	Supported Browsers	Chrome Firefox Edge Internet Explorer 10 onwards Safari 10 onwards Safari (iOS 10 onwards) Chrome (Android 6.0 onwards)
	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
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. CPU and RAM usage were both under 80% when the number of maximum users was reached.
Download Station	Maximum Concurrent Download Tasks	80
exFAT Access (Optional)
Media Server	DLNA Compliance
Moments	Facial Recognition
	Subject Recognition
Surveillance Station	Maximum IP cam (Licenses required)	16 (including 2 Free License) (See All Supported IP Cameras)
	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	Surveillance Station throughput is tested with Axis network camera, using continuous recording with live view from Surveillance Station and motion detection by camera. Live view and recording are sharing the same stream from the camera.
Synology Drive	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	Exceeding the limits above may result in longer response time in file operations. EXT4 file system and non-encrypted shared folders were used during the aforementioned testing.
Synology Office	Maximum Users	200
	Notes	Multiple files were opened for testing and each file was edited by 30 users simultaneously. CPU and RAM usage were both under 80% when the number of maximum users was reached. Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
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. No other services or applications are processed during the performance tests.

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