DS420J Synology Desktop 4 bays TOP NOTCH


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.


BEST Synology DS420j is a 4-bay desktop NAS designed for home users’ data backup and file sharing. It supports various networking protocols, multiple RAID configurations, and diverse add-on packages, effortlessly enabling cross-platform file synchronization and sharing on a private cloud.

SKU: DS420j Category: Tag:
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CPU Realtek RTD1296 4-core 1.4 GHz
Memory 1 GB DDR4
Compatible drive type 4 x 3.5″ or 2.5″ SATA HDD/SSD (drives not included)
External port 2 x USB 3.0 port
Size (HxWxD) 184 x 168 x 230 mm
Weight 2.21 kg
LAN 1 x Gigabit (RJ-45)
Wake on LAN/WAN Yes
Scheduled power on/off Yes
System fan 2 (80 x 80 mm)
AC input power voltage 100 V to 240 V AC
Power frequency 50/60 Hz, single phase
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
Maximum operating altitude 5,000 m (16,400 ft)
General DSM Specifications
Networking protocol SMB, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP, VPN (PPTP, OpenVPN™, L2TP)
File system • Internal: ext4
• External: ext4, ext3, FAT, NTFS, HFS+, exFAT3
Supported RAID type Synology Hybrid RAID (SHR), Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10
Hardware Overview
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DATASHEET | DiskStation DS420j
Storage management • Maximum single volume size: 108TB
• Maximum internal volume: 64
File sharing capability
• Maximum local user account: 1,024
• Maximum local group: 256
• Maximum shared folder: 256
• Maximum concurrent SMB/NFS/AFP/FTP connection: 100
Privilege Windows Access Control List (ACL), application privilege
Directory service Windows® AD integration: Domain users log in via SMB/NFS/AFP/FTP/File Station, LDAP integration
Security Firewall, shared folder encryption, SMB encryption, FTP over SSL/TLS, SFTP, Rsync over SSH, login autoblock, Let’s Encrypt
support, HTTPS (customizable cipher suite)
Supported client Windows 7 onwards, Mac OS X® 10.11 onwards
Supported browser Chrome®, Firefox®, Edge®, Internet Explorer® 10 onwards, Safari® 10 onwards; Safari (iOS 10 onwards), Chrome (Android™ 6.0
onwards) on tablets
Interface language
Packages and Applications
File Server & Synchronization
Synology Drive
Provides a universal portal to synchronize files across various platforms, including Windows, macOS, Linux, Android, and iOS
• Maximum number of hosted files: 100,000
• Maximum number of concurrent connections for PC clients: 200
File Station Virtual drive, remote folder, Windows ACL editor, compressing/extracting archived files, bandwidth control for specific users
or groups, creating sharing links, transfer logs
FTP Server Bandwidth control for TCP connections, custom FTP passive port range, anonymous FTP, FTP SSL/TLS, and SFTP protocol,
boot over the network with TFTP and PXE support, transfer logs
Cloud Sync
One or two-way synchronization with public cloud storage providers including Alibaba Cloud OSS, Amazon Drive, Amazon
S3-compatible storage, Backblaze B2, Baidu Cloud, Box, Dropbox, Google Cloud Storage, Google Drive, hubiC, MegaDisk,
Microsoft OneDrive, OpenStack Swift-compatible storage, Tencent COS, WebDAV servers, Yandex Disk
Universal Search Offers global searches into applications and files
iSCSI Storage
iSCSI Manager • Maximum iSCSI target: 10
• Maximum iSCSI LUN: 10
Data Protection & Backup Solution
Hyper Backup Supports local backup, network backup, and backup data to public clouds
Backup tools DSM configuration backup, macOS Time Machine support, Synology Drive Client desktop application
• Shared folder sync – maximum task number: 4
Productivity & Collaboration
Collaboration tools
Supports collaboration with instant message service Synology Chat, online editor Synology Office, and scheduling assistant
Synology Calendar
• Chat maximum user: 10
• Office maximum user: 200
• Calendar: support CalDAV and access via mobile devices
Note Station Rich-text note organization and versioning, encryption, sharing, media embedding, and attachments
Moments Supports a smart AI album with facial and subject recognition, similar photodetection, and photo editing and sharing features.
Mobile applications are available on iOS and Android devices.
Other packages Video Station, Photo Station, Audio Station, iTunes® Server
Surveillance Station Maximum IP camera: 16 (total of 480 FPS at 720p, H.264) (Including two free camera licenses; additional cameras require the
purchasing of additional licenses)
All-in-One Server
VPN Server Maximum connection: 10, supported VPN protocol: PPTP, OpenVPN™, L2TP/IPSec
English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svensk, Nederlands, Русский, Polski, Magyar,
Português do Brasil, Português Europeu, Türkçe, Český,
DATASHEET | DiskStation DS420j
Mail Server Supported Mail Server Protocols: POP3, SMTP, IMAP, Support LDAP/AD account
Mail Station Webmail interface for Mail Server to receive emails from multiple POP3 mailboxes, customizable SMTP server
Web Station Virtual host (up to 30 websites), PHP/MariaDB®, third-party applications support
Other packages DNS Server, RADIUS Server, Log Center
Storage Analyzer Volume and quota usage, the total size of files, volume usage and trends based on past usage, size of shared folders, large files,
most recently modified files, least recently accessed files
Antivirus Essential Full system scan, scheduled scan, white list customization, virus definition auto-update
iOS/Android™ applications Synology Drive, DS audio, DS photo, DS video, DS cam, DS file, DS finder, DS note, Moments
Other packages Additional 3rd-party packages available in Package Center


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