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DiskStation DS223j


The Synology DS223j 2-Bay NAS device is an efficient one-stop solution for all your data storage and sharing needs. With two (2) bays of storage and Synology DiskStation Manager (DSM) on board, the DS223j allows you to create a private cloud to protect your files, share your data across several devices, store security footage with intelligent video surveillance tools, and more.

Key Features

  • Capacity
    Un-populated two (2) bay network attached NAS storage device with 1GB RAM.
  • Centralised Data Storage
    Consolidate all your data with complete data ownership and multi-platform access.
  • Next-Generation File System
    Leverage file self-healing, lightning-fast data snapshots, and rapid data cloning.
  • Secure Sharing and Syncing
    Safely access and share files and media from anywhere, and keep clients, colleagues and collaborators on the same page.
  • Simple Data Protection
    Back up your media library or document repository to a variety of destinations.
  • Versatile Camera Surveillance
    Protect your premises with flexible monitoring tools.

Access Your Files Anytime, Anywhere

Organise data scattered across devices. Your Synology NAS can serve as a go-to platform to securely and conveniently store any type of data with comprehensive and intuitive access and management tools.

  • Enable QuickConnect to access your NAS securely from anywhere without configuring complex port forwarding rules.
  • Browse and manage your files and media from any browser with Synology Drive, or access data through your default file browser using common network protocols.
  • Keep your photos and videos organised using Synology Photos’ smart sorting functions.
  • Deploy your Synology NAS as edge storage and fit it easily into existing infrastructure thanks to Windows AD and LDAP integration.

Collaboration and Synchronisation Platform

Easily share documents with colleagues and boost productivity while working in a team or with your clients.

  • Build a private data cloud for easy file management and sharing across all platforms, and keep data in sync between two Synology systems with Synology Drive.
  • Synchronise data to and from popular cloud storage platforms with Synology Cloud Sync.
  • Share media with colleagues or collaborators through the privacy-focused sharing options in Synology Photos.

Flexible Data Protection Options

Synology DSM comes with a host of backup and data protection solutions available at no extra cost.

  • Leverage Synology Drive to protect data from ransomware attacks or accidental deletion with real-time or scheduled backup of your PC folders.
  • Safeguard photos and videos taken on mobile devices by automatically creating remote copies with Synology Drive or Synology Photos.
  • Efficiently back up your entire Synology NAS or select folders to multiple destinations using Hyper Backup.
  • Store backups off-site on C2 Storage, a dedicated and secure cloud destination powered by Synology C2.
  • Create point-in-time snapshots with Snapshot Replication, allowing users to reverse any unplanned or unwanted changes.

Versatile and Private Video Surveillance

Synology Surveillance Station transforms your Synology system into a powerful network video recorder (NVR).

  • 8,300+ supported camera models.
  • ONVIF support for a broader selection of cameras.
  • Private, subscription-free storage of recordings.
  • Access through web browsers, desktop clients, or mobile apps.
  • Event-based rules to trigger specific actions.
  • Email, SMS, and push notification options.
  • Dual recording to the cloud with C2 Surveillance for online access and convenient sharing.
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Hardware Specs


CPU Model

  • Realtek RTD1619B

CPU Quantity

  • 1

CPU Architecture

  • 64-bit

CPU Frequency

  • 4-core 1.7 GHz

Hardware Encryption Engine

  • Yes


System Memory

  • 1 GB DDR4 non-ECC


Drive Bays

  • 2 (un-populated)

Compatible Drive Type

  • 3.5-inch SATA HDD
  • 2.5-inch SATA SSD (with optional 2.5-inch Disk Holder – sold separately, see accessories tab)

External Ports

RJ45 1GbE LAN Port

  • 1

USB 3.2 Gen 1 Port

  • 2

File System

Internal Drives

  • Btrfs (Btrfs file system is available from DSM 7.2-64570.)
  • EXT4

External Drives

  • Btrfs (Btrfs file system is available from DSM 7.2-64570.)
  • EXT4
  • EXT3
  • FAT
  • NTFS
  • HFS+
  • exFAT


Size (Height x Width x Depth)

  • 165 mm x 100 mm x 225.5 mm


  • 0.88 kg


System Fan

  • 92 mm x 92 mm x 1 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

  • 18.2 dB(A)

Scheduled Power On / Off

  • Yes

Wake on LAN / WAN

  • Yes

Power Supply Unit / Adapter

  • 60 W

AC Input Power Voltage

  • 100V to 240V AC

Power Frequency

  • 50/60 Hz, Single Phase

Power Consumption

  • 16.31 W (Access)
  • 4 W (HDD Hibernation)

British Thermal Unit

  • 55.62 BTU/hr (Access)
  • 13.64 BTU/hr (HDD Hibernation)


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


  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • UKCA
  • EAC
  • CCC
  • KC


  • RoHS Compliant

Software Specs

DSM Specifications

Storage Management

Maximum Single Volume Size

  • 108 TB

Maximum Internal Volume Number

  • 64

Supported RAID Type

  • Synology Hybrid RAID
  • Basic
  • JBOD
  • RAID 0
  • RAID 1

RAID Migration

  • Basic to RAID 1

Volume Expansion with Larger HDDs

  • Synology Hybrid RAID
  • RAID 1

Volume Expansion by Adding a HDD

  • Synology Hybrid RAID

File Services

File Protocol


Maximum Concurrent SMB/AFP/FTP Connections

  • 100

Windows Access Control List (ACL) Integration

  • Yes

NFS Kerberos Authentication

  • Yes

Account & Shared Folder

Maximum Local User Accounts

  • 1,024

Maximum Local Groups

  • 256

Maximum Shared Folder

  • 256

Maximum Shared Folder Sync Tasks

  • 4

Hyper Backup

Data & Folder Backup

  • Yes

Log Centre

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

  • Google Chrome
  • Firefox
  • Microsoft Edge
  • Safari

Supported Language

  • English, German, French, Italian, Spanish, Danish, Norwegian, Swedish, Dutch, Russian, Poland, Hungarian, Portuguese (Brazil), Portuguese (Europe), Turkish, Czech, Thai, Japanese, Korean, Chinese (Traditional & Simplified)

Add-on Packages

Synology Chat

  • Yes

Download Station

Maximum Concurrent Download Tasks

  • 80

SAN Manager

Maximum iSCSI Target Number

  • 10

Maximum LUN

  • 10

LUN Clone/Snapshot, Windows ODX

  • Yes

Media Server

DLNA Compliance

  • Yes

Synology Photos

Facial Recognition

  • Yes

Snapshot Replication

Maximum Snapshots per Shared Folder

  • 256

Maximum of System Snapshots

  • 4,096


  • Snapshot Replication is available from DSM 7.2-64570.

Surveillance Station

Maximum IP cam (licences required, sold separately)

  • 12 (including 2 Free Licences)

Total FPS (H.264)

  • 360 FPS @ 720p (1280×720)
  • 360 FPS @ 1080p (1920×1080)
  • 300 FPS @ 3M (2048×1536)
  • 150 FPS @ 5M (2591×1944)
  • 110 FPS @ 4K (3840×2160)

Total FPS (H.265)

  • 360 FPS @ 720p (1280×720)
  • 360 FPS @ 1080p (1920×1080)
  • 360 FPS @ 3M (2048×1536)
  • 350 FPS @ 5M (2591×1944)
  • 200 FPS @ 4K (3840×2160)

Synology Drive

Recommended Number of Concurrent Sync Clients

  • 200 (the number of connections that can be maintained when the recommended number of hosted files was reached)

Recommended Number of Hosted Files

  • 500,000 (applies to files indexed or hosted by Synology Drive)

Synology Office

Maximum Users

  • 200

Video Station

  • Yes

VPN Server

Maximum Connections

  • 10

Package Contents

  • 1 x DS223j Enclosure
  • 1 x Accessory Pack
  • 1 x AC Power Adapter
  • 1 x AC Power Cord
  • 1 x RJ45 LAN Cable
  • 1 x Quick Installation Guide