Synology Diskstation DS420j Network Attached Storage

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.

• 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

Organize your photos intelligently with Moments, a modern, AI-enabled photo management application that lets you effortlessly preserve your precious memories. 

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.

• Apple TV
• Android TV
• Samsung TV

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

Access and sync your files seamlessly

Synology Drive provides a built-in universal portal to access your data anytime and anywhere, and synchronize all your files across platforms, including Windows, macOS, Linux, Android, and iOS. 

• 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. 

Specifications

CPU

• CPU Model : Realtek RTD1296
• CPU Quantity : 1
• CPU Architecture : 64-bit
• CPU Frequency : 4-core 1.4 GHz
• Hardware Encryption Engine : Yes

Memory

• System Memory : 1 GB DDR4 non-ECC
• 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 Single Volume Size* : 108 TB
• Hot Swappable Drive : -
• 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 3.0 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 : 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 : 
  • Power consumption is measured when it is 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

• EAC
• CCC
• FCC
• CE
• BSMI
• VCCI
• 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

• VisualStation: VS960HD/VS360HD
• Surveillance Device License Pack

DSM Specifications

Storage Management

• Maximum Internal Volume Number : 64
• Maximum iSCSI Target Number : 10
• Maximum iSCSI LUN : 10
• SSD TRIM : Yes
• Supported RAID Type : Yes
  • 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 : 
  • Google Chrome
  • Firefox
  • Microsoft Edge
  • Internet Explorer 10 onwards
  • Safari 10 onwards
  • Safari (iOS 10 onwards)
  • Google Chrome (Android 6.0 onwards)
• Supported Language : English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, ???????, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, ?eský, ???????, ???, ???, ????, ????