DiskStation^® DS423+

Performance Compatibility Downloads Compare

DiskStation^® DS423+

A compact storage hub with 100% data ownership

Features
Specs

Conquer home office data chaos

Download Datasheet

Capable and compact

Powerful functionality packed into a 4-bay chassis

Consolidate and share

Store, organize, and share up to 80 TB of data.

Integrated data protection

Contains hardware and software safeguards engineered to protect your data — trusted by millions.

A capable all-around performer

The versatile DS423+ can serve as a central storage device as well as a multimedia hub.

Up to 226/224 MB/s read/write

2 x M.2 NVMe SSD slots

2 x 1GbE LAN ports

Btrfs: advanced file system for data protection

The Synology DiskStation Manager (DSM) operating system that powers DS423+ uses the advanced Btrfs file system, which safeguards your data against corruption and allows for the reversal of any unintended or malicious changes through the use of snapshot technology. Learn more

Store, share, and protect

Manage all your documents, photos, and other files, back up applications and devices, and protect your physical assets with professional video surveillance.

Private cloud for seamless data access

Effortlessly keep multiple Synology NAS in sync

Multi-layered backup

Back up PCs, smartphones, cloud apps, and more

Smart surveillance

Performance backed by Synology drives

Leverage high sustained performance and reliability with enterprise-grade drives and built-in data protection designed for Synology systems.

Enterprise Series 3.5" SATA Plus Series 3.5" SATA

Enterprise Series 2.5" SATA Enterprise Series M.2 NVMe

Get more with DiskStation Manager

Take advantage of a host of native productivity, management, and security solutions available in the web-based Synology DSM operating system.

Central Management System

Conveniently manage your fleet of Synology NAS from a centralized console.

Learn more

Security

Shield your Synology NAS from the most sophisticated threats with industry-leading security solutions.

Learn more

Synology High Availability

Seamless transition between clustered servers in the event of a server failure to minimize the impact on applications.

Learn more

Extra protection with Extended Warranty Plus

Extend the standard 3-year hardware warranty of your DS423+ with 2 more years of Synology-certified support and premium services to help you recover faster in the event of disaster.

Hardware Overview

1Status Indicator
2Drive Status Indicators
3Memory Expansion Slot
4Drive Tray Locks

5USB 3.2 Gen 1 Port
6Power Button
7Drive Trays
81GbE RJ-45 Ports

9Reset Button
10USB 3.2 Gen 1 Port
11Power Port
12Fans

13Kensington Security Slot
14M.2 NVMe SSD Slots

More ways to harness your NAS

Storage for content creators

Synology NAS brings speed, simplicity, and security to all your creative projects.

Learn more

Complete endpoint protection

Follow the 3-2-1 backup strategy and keep your data safe with Synology’s backup packages.

Learn more

Ransomware prevention and protection

Minimize the threat posed by increasingly sophisticated ransomware and other malware with Synology solutions.

Learn more

Notes:

Performance figures are obtained through internal testing by Synology. Actual performance may vary depending on the testing environment, usage, and configuration. See performance charts for more information.
Synology SNV3400 series M.2 NVMe SSD drives can be installed through the built-in M.2 slots to enable SSD caching or create SSD storage pools. Drives are sold separately.
C2 Storage for Hyper Backup and Hybrid Share requires purchase of an eligible annual or monthly subscription. A free trial is available for each newly registered Synology Account. Learn more
Surveillance Station includes 2 free licenses. Connecting more cameras and devices requires additional licenses.
PCIe add-in cards, expansion units, and storage drives are sold separately. Refer to the compatibility list for compatible devices.
Extended Warranty Plus must be purchased within 90 days of the device purchase date, or if none is available, 180 days of the device manufacturing date. A Synology Account is required for the purchase. The starting date of the Extended Warranty Plus additional coverage is calculated based on the purchase date of your Synology NAS. If you cannot provide proof of purchase, the device manufacturing date applies.
Express shipping is a paid add-on available in select countries only.

Hardware Specifications
CPU
CPU	CPU Model	Intel Celeron J4125
	CPU Quantity	1
	CPU Core	4
	CPU Architecture	64-bit
	CPU Frequency	2.0 (base) / 2.7 (turbo) GHz
	Hardware Encryption Engine
Memory
Memory	System Memory	2 GB DDR4 non-ECC
	Total Memory Slots	1
	Maximum Memory Capacity	6 GB (2 GB + 4 GB)
	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. Please select Synology memory modules for optimum compatibility and reliability. Synology will not provide complete product warranty or technical support if non-Synology memory modules are used for memory expansion.
Storage
Storage	Drive Bays	4
	M.2 Drive Slots	2 (NVMe)
	Compatible Drive Type* (See all supported drives)	3.5" SATA HDD 2.5" SATA SSD M.2 2280 NVMe SSD
	Hot Swappable Drive*
	Notes	The hot swappable drive feature is not supported by M.2 SSD slots. "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
External Ports	RJ-45 1GbE LAN Port	2
	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. The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019.
Appearance
Appearance	Size (Height x Width x Depth)	166 mm x 199 mm x 223 mm
	Weight	2.18 kg
Others
Others	System Fan	92 mm x 92 mm x 2 pcs
	Fan Speed Mode	Full-Speed Mode Cool Mode Quiet Mode
	Brightness Adjustable Front LED Indicators
	Power Recovery
	Noise Level*	19.8 dB(A)
	Scheduled Power On / Off
	Wake on LAN / WAN
	Power Supply Unit / Adapter	90 watts
	AC Input Power Voltage	100V to 240V AC
	Power Frequency	50/60 Hz, Single Phase
	Power Consumption	28.3 watts (Access) 8.45 watts (HDD Hibernation)
	British Thermal Unit	96.5 BTU/hr (Access) 28.81 BTU/hr (HDD Hibernation)
	Notes	For more information on how power consumption is measured, refer to this article. Noise testing was conducted with the Synology system fully installed with Synology SATA HDDs and in an idle stae. Two G.R.A.S. Type 40AE microphones are placed at a 1 m distance from the front and rear of the device. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%
Temperature
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
Certification	FCC CE BSMI VCCI RCM UKCA EAC CCC KC
Warranty
Warranty	3-year hardware warranty, extendable to 5 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. Refer to the Extended Warranty Plus website for details on supported countries/regions. (Learn more)
Environment
Environment	RoHS Compliant
Packaging Content
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 2 Quick Installation Guide X 1
Optional Accessories
Optional Accessories	DDR4 non-ECC SODIMM: D4NESO-2666-4G Enterprise Series 3.5" SATA HDD: HAT5300 Series Plus Series 3.5" SATA HDD: HAT3300 Series Enterprise Series 2.5" SATA SSD: SAT5200 Series Enterprise Series M.2 2280 NVMe SSD: SNV3400 Series
	Notes	All memory modules will operate at the maximum frequency specified by the CPU manufacturer.

DSM Specifications
Storage Management
Storage Management	Maximum Single Volume Size	108 TB
	Maximum Internal Volume Number	64
	M.2 SSD Storage Pool Support*
	SSD Read/Write Cache (Determining cache size)
	SSD TRIM
	Supported RAID Type	Synology Hybrid RAID Basic JBOD RAID 0 RAID 1 RAID 5 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
	Notes	Creating M.2 storage pools requires the use of Synology-verified SSDs, which are rigorously tested under extreme temperature conditions. Thermal parameters for SSDs and NAS units are fine-tuned to ensure optimal management of thermal conditions under I/O-intensive environments. (Learn more) 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. Actual maximum storage pool and volume sizes depend on drive sizes used, the number of drive bays available, and the RAID configuration.
File System
File System	Internal Drives	Btrfs ext4
	External Drives	Btrfs ext4 ext3 FAT NTFS HFS+ exFAT
File Services
File Services	File Protocol	SMB AFP NFS FTP WebDAV Rsync
	Maximum Concurrent SMB/AFP/FTP Connections	500
	Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion)	1,500
	Windows Access Control List (ACL) Integration
	NFS Kerberos Authentication
	Notes	Regarding data concerning tests with RAM expansion, all memory slots are installed with the maximum capacity of supported RAM. The testing standard was based on the maximum number of concurrent connections supported by this model. During the testing, 25% of the connections were used to transfer files concurrently. The transfer process guaranteed that the connections were not interrupted; the minimum transfer speed was not guaranteed.
Account & Shared Folder
Account & Shared Folder	Maximum Local User Accounts	2,048
	Maximum Local Groups	256
	Maximum Shared Folder	512
	Maximum Shared Folder Sync Tasks	8
Hybrid Share
Hybrid Share	Hybrid Share Folder Number	10
Hyper Backup
Hyper Backup	Data & Folder Backup
	Entire System Backup
	Notes	Full-system backup requires DSM 7.2 or later.
High Availability
High Availability	Synology High Availability
Log Center
Log Center
	Syslog Events per Second	800
Virtualization
Virtualization	VMware ESXi 6.5 and VAAI
	Windows Server 2022
	Citrix Ready
	OpenStack
General Specifications
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
Central Management System
Central Management System
Synology Chat
Synology Chat
	Suggested Concurrent Users	100
	Notes	Measured with simulated users, each with an average record of 20,000 messages, emojis, or stickers. The required server response time is below ten seconds. For tested models with expandable memory, the maximum amount of RAM was installed.
Download Station
Download Station
	Maximum Concurrent Download Tasks	80
SAN Manager
SAN Manager
	Maximum iSCSI Target Number	128
	Maximum LUN	256
	LUN Clone/Snapshot, Windows ODX
Synology MailPlus / MailPlus Server
Synology MailPlus / MailPlus Server
	Free Email Accounts	5 (Additional accounts require purchase of licenses)
	Suggested Maximum Users	500
	Suggested Concurrent Users	100
	Maximum Server Performance	1,224,000 emails per day, approx. 37GB
	Notes	Models with more than 4 bays were installed with two SSDs for SSD cache. For tested models with expandable memory, the maximum amount of RAM was installed. The performance of the mail system will slightly decrease in high-availability mode due to data synchronization between the two servers. Functions that were enabled in all of the tests above: anti-spam, anti-virus, DNSBL, greylist, content scan, full-text search (English only).
Media Server
Media Server
	DLNA Compliance
Synology Photos
Synology Photos
	Facial Recognition
	Object Recognition
	Notes	Object recognition requires an upgrade of memory capacity to a minimum of 4 GB.
Snapshot Replication
Snapshot Replication
	Maximum Snapshots per Shared Folder	1,024
	Maximum of System Snapshots	65,536
Surveillance Station
Surveillance Station
	Default Licenses	2 (Additional cameras require purchase of licenses)
	Suggested Maximum IP Cameras and Total FPS (H.264)	720p: 40 channels, 1200 FPS 1080p: 40 channels, 800 FPS 3M: 35 channels, 350 FPS 5M: 28 channels, 280 FPS 4K: 17 channels, 170 FPS
	Suggested Maximum IP Cameras and Total FPS (H.265)	720p: 40 channels, 1200 FPS 1080p: 40 channels, 1200 FPS 3M: 40 channels, 600 FPS 5M: 40 channels, 480 FPS 4K: 20 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 maximum number of camera stream outputs is 2 times the suggested maximum number of IP cameras.
Synology Drive
Synology Drive
	Recommended Number of Concurrent Sync Clients	350 (the number of connections that can be maintained when the recommended number of hosted files was reached)
	Recommended Number of Hosted Files	5,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
	Notes	Exceeding the recommended numbers above will not block application operations, but may result in longer response time. Utilizing SSD cache can significantly improve performance. For tested models with expandable memory, the maximum amount of RAM was installed. Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
Synology Office
Synology Office
	Suggested Maximum Users	3,000
	Suggested Concurrent Users	1,200
	Notes	Multiple files were opened for testing and each file was edited by 30 users simultaneously. For tested models with expandable memory, the maximum amount of RAM was installed. Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
Virtual Machine Manager
Virtual Machine Manager
	Recommended Virtual Machine Instances	2 (Learn more)
	Recommended Virtual DSM Number (Licenses required)	2 (including 1 Free License)
	Notes	The specifications vary depending on system configuration and memory size.
VPN Server
VPN Server
	Maximum Connections	40

Notes:

Model specifications are subject to change without prior notice.
The figures are based on Synology internal testing. Each performance test is done individually. No other services or applications are processed at the same time.
The actual performance may be lower than lab testing figure due to differences in server configuration, deployment, and the number of active operations.
If usage requirements exceed the specifications above, please contact our regional partners for professional advice.