DiskStation DS223j

Compact, quiet, and energy-efficient storage

Built for sharing

DS223j is designed for small teams to share, sync, and collaborate more efficiently.

Secure private cloud

Anywhere, anytime secure access to all your data.

Easy sharing and syncing

Safely access and share files and media from anywhere.

Comprehensive data protection

Hardware and software engineered to protect your data — trusted by millions.

Hardware Specifications
CPU	CPU Model	Realtek RTD1619B
	CPU Quantity	1
	CPU Core	4
	CPU Architecture	64-bit
	CPU Frequency	1.7 GHz
	Hardware Encryption Engine
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	2
	Drive Type (See all supported drives)	3.5″ SATA HDD 2.5″ SATA SSD (with optional 2.5″ Disk Holder)
	Hot Swappable Drive*	–
External Ports	RJ-45 1GbE LAN Port	1
	USB 3.2 Gen 1 Port	2
	Notes	This device’s 1GbE LAN ports have a maximum transmission unit (MTU) size of 1,500 bytes.
Appearance	Size (Height x Width x Depth)	165 mm x 100 mm x 225.5 mm
	Weight	0.88 kg
Others	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
	Power Recovery
	Noise Level*	18.2 dB(A)
	Scheduled Power On / Off
	Wake on LAN / WAN
	Power Supply Unit / Adapter	60 watts
	AC Input Power Voltage	100V to 240V AC
	Power Frequency	50/60 Hz, Single Phase
	Power Consumption*	16.31 watts (Access) 4 watts (HDD Hibernation)
	British Thermal Unit	55.62 BTU/hr (Access) 13.64 BTU/hr (HDD Hibernation)
	Notes	For more information on how power consumption is measured, refer to this article. 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)
	Operating Humidity	8% to 80% RH
	Storage Humidity	5% to 95% RH
Certification	FCC CE BSMI VCCI RCM UKCA EAC CCC KC BIS
Warranty	2-year hardware warranty, extendable to 4 years with Extended Warranty Plus
	Notes	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) Extended Warranty Plus is only available in Europe and North America. EW201/EW202 is only available in Asia, Africa, and Oceania. For exact availability information please visit their respective websites.
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	Plus Series 3.5″ SATA HDD: HAT3300 Series Disk Holder: Type C

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
	Notes	Actual maximum storage pool and volume sizes depend on drive sizes used, the number of drive bays available, and the RAID configuration. Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and the amount of system metadata stored.
File System	Internal Drives	Btrfs ext4
	External Drives	Btrfs ext4 ext3 FAT32 NTFS HFS+ exFAT
	Notes	Btrfs file system is available from DSM 7.2-64570.
File Services	File Protocol	SMB AFP NFS FTP WebDAV Rsync
	Maximum Number of SMB Connections (FSCT-Based)	5
	Windows Access Control List (ACL) Integration
	NFS Kerberos Authentication
	Notes	Connection value of this model is tested with Synology SATA HDD fully populated and all onboard network ports SMB performance was evaluated using Microsoft File Server Capacity Tool (FSCT) version 1.3, with the following configuration: Test workload: HomeFolder scenario provided by the FSCT tool Test duration: 600 seconds Domain controller & FSCT controller: Windows Server 2022 FSCT clients: 8 × Windows 10 machines SMB feature: Directory leasing enabled
Account & Shared Folder	Maximum Local User Accounts	256
	Maximum Local Groups	64
	Maximum Shared Folder	64
	Maximum Shared Folder Sync Tasks	2
Hyper Backup	Folder and Package Backup
Log Center	Syslog Events per Second	200
General Specifications	Supported Protocols	SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
	Supported Browsers	Chrome Firefox Edge Safari
	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
	Notes	For an updated list of supported browser versions, check the DSM Technical Specifications.
Add-on Packages view the complete package list
Synology Chat
Download Station	Maximum Concurrent Download Tasks	80
SAN Manager	Maximum iSCSI Target Number	2
	Maximum LUN	4
	LUN Clone/Snapshot, Windows ODX
Media Server	DLNA Compliance
Synology Photos	Facial Recognition
Snapshot Replication	Maximum Snapshots per Shared Folder	128
	Maximum of System Snapshots	1,024
	Notes	Snapshot Replication is available from DSM 7.2-64570.
Surveillance Station	Default Licenses	2 (Additional cameras require purchase of licenses)
	Suggested Maximum IP Cameras and Total FPS (H.264)	1080p: 12 channels, 360 FPS 3M: 12 channels, 300 FPS 5M: 12 channels, 150 FPS 4K: 11 channels, 110 FPS
	Suggested Maximum IP Cameras and Total FPS (H.265)	1080p: 12 channels, 360 FPS 3M: 12 channels, 360 FPS 5M: 12 channels, 350 FPS 4K: 12 channels, 200 FPS
	Notes	Performance figures are obtained from testing conducted with the device fully populated with drives, with their default memory configuration, and under a continuous recording setup. Actual system capabilities may vary based on configuration, drive performance, enabled features, and the presence of additional workloads. Use NVR Selector to quickly find a suitable model based on your requirements. The number of streams that can be viewed simultaneously is twice the suggested maximum number of cameras. For example, if the suggested maximum number of cameras for a model is 10 under H.264, 1080p, the model can support up to 20 streams of the same specification at the same time.
Synology Drive	Maximum Number of Users	5
	Maximum 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)
	Notes	The suggested maximum number of users is based on the following workload: 20% of users randomly perform file operations (upload, download, move, and delete), and 80% of users are logged in but idle. Learn more Models with SSD support are tested with a single SSD volume. Exceeding the recommended numbers above will not block application operations, but may result in longer response time. Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
Synology Office	Maximum Number of Users	5
	Notes	The suggested maximum number of users is based on the following workload: 20% of users are executing random actions at an average of 30-second intervals, and 80% of users are logged in and viewing a file. Learn more Models with SSD support are tested with a single SSD volume. Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
VPN Server	Maximum Connections	2