About this item
- 2-bay business NAS with max 126 TB raw capacity support with DX517, suitable for Data Backup and File Sharing
- Synology Drive: Free File Server Solution
- Synology Photos: Mobile Photos Backup & Photo Sharing solution
- Surveillance Station: NVR solution
- Active Backup for Business: Free Backup Solution for PCs, Servers, and VMs
Take your data management to the next level
Versatile smart storage that helps you consolidate and store your growing digital data.
Download Datasheet
Stunningly compact
Powerful functionality in a tiny package, with room for 10GbE and dual NVMe drives.
Consolidate and share
Flexibly store and organize 40 TB of data, then share with anyone.
Keep your data safe
Hardware and software engineered to protect your data — trusted by millions.
Simply faster
DS723+ can handle more demanding application workloads and a greater number of concurrent users compared to prior-generation systems. Experience faster file indexing in Synology Drive, photo organization in Photos, and concurrent file transfers.1
The DS723+ is 24% faster in file indexing
Synology Drive 24% faster file indexing
Synology Photos 25% faster photo indexing
multiple file transfers 32% faster in random write
The performance during multiple file transfers compared to its predecessorMultiple file transfers
The performance you need
Reduce transfer times with the DS723+, designed to accelerate your workloads. Easily add faster networking and NVMe drives to further boost performance.
The DS723+ achieves up to 471 MB/s read and 225 MB/s write speeds
Up to471/225 MB/sread/write2
It can be configured with 10GbE networking
Up to10GbEnetworking3
and features two M.2 NVMe slots for caching or storage pool creation
2 x M.2NVMecache & storage pool4
Versatile and flexible storage
Make the most of high-performance networking and file access without taking up unnecessary space. DS723+ comes equipped with 2 bays and can scale up to 7 bays with the DX517 expansion unit as your data needs grow.
The DS723+ supports up to 100 TB of storage capacity in a RAID 5 configuration
2 bays20TB
7 bays100 TB
Store, share, and protect
Manage all your documents, photos, and other files, back up applications and devices, and protect your assets with professional video surveillance.
Private cloud storage
Multi-layered backup
Smart surveillance
Private cloud storage
Access files from all your devices and protect them with smart versioning. Manage, share, and sync your data across locations.
Consolidate data management
A private cloud for all your devices
Effortlessly deploy your own personal cloud with Synology’s private cloud solution. Simplify file access and consolidate your data management to benefit from easier file sharing and collaboration.Learn more
Professional photo management
Efficiently back up and organize photos and videos with management tools for novice and professional users alike. Automatically organize your content into albums and create secure share links to share files with family, friends, or clients.Learn more
Collaborate across sites
Sync files and folders between sites
Site-to-site file syncing allows collaborators to sync individual files or folders between Synology devices, whether at home, another office, or across the world. Combine convenient access with 100% data ownership.
Share data with the power of the cloud
Reduce your on-site storage footprint and benefit from data center network speeds with hybrid cloud technology. Set up Hybrid Share Folders5 to efficiently store cold data in the cloud, while keeping frequently accessed files cached locally on your DS723+ and accessible at LAN speeds.Learn more
Multi-layered backup
Back up files, folders, physical devices, VMs, and SaaS applications with free solutions, and protect your NAS with built-in technologies.
Back up all your devices
Centralize your backup and recovery solution
Consolidate and automate backup tasks for PCs, file servers, VMs, SaaS applications, and more with Active Backup Suite. Administer device backups remotely through a centralized portal and quickly restore specific files or entire devices to keep your business up and running. Take advantage of built-in remote backup solutions designed to protect your data with seamless 3-2-1 backup configurations.Learn more
Protect your Synology system
Perform full Synology system backups
Protect all data, applications, and configurations on your Synology systems with comprehensive scheduled backups to local and remote servers, external drives, or cloud storage destinations including Synology C2 Storage.Learn more
Protect folders and LUNs with snapshots
Configure efficient point-in-time snapshots of shared folders and LUNs at intervals as short as 5 minutes. Allow users to easily restore previous versions of files unassisted, quickly recover VMs, and copy snapshots to another server to benefit from rapid storage failover.Learn more
Smart surveillance
Transform your Synology device into a full-featured video management system for a wide range of compatible IP cameras.
Monitor and protect your business
Synology Surveillance Station
Protecting your business has never been easier with centralized video management, support for over 8,300 IP camera models, and remote monitoring and playback of footage. Synology’s surveillance management system provides all the tools you need for live monitoring, alerts, investigation, management, and backup.6Learn more
Back up your surveillance footage
Dual recording
C2 Backup for Surveillance allows you to keep access to surveillance footage if your recording server is disabled by recording to your local server as well as C2 cloud. End-to-end encryption protects streams against unauthorized access while low latency recording lets you review the crucial last few seconds before the recording server was lost.
Performance backed by Synology drives
Leverage high sustained performance and reliability with enterprise-grade drives with built-in data protection designed for Synology systems.3
HDD
Enterprise Series 3.5" SATAPlus Series 3.5" SATA
SSD
Enterprise Series 2.5" SATAEnterprise 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
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Hardware Specifications
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CPU
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CPU Model |
AMD Ryzen R1600 |
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CPU Quantity |
1 |
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CPU Core |
2 |
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CPU Architecture |
64-bit |
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CPU Frequency |
2.6 (base) / 3.1 (turbo) GHz |
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Hardware Encryption Engine |
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Memory
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System Memory |
2 GB DDR4 ECC SODIMM |
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Memory Module Pre-installed |
2 GB (2 GB x 1) |
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Total Memory Slots |
2 |
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Maximum Memory Capacity |
32 GB (16 GB x 2) |
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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.
- For more information about the recommended memory configurations, please check the Hardware Installation Guide of your Synology product.
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Storage
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Drive Bays |
2 |
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Maximum Drive Bays with Expansion Unit |
7 (DX517 x 1) |
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M.2 Drive Slots |
2 (NVMe) |
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Compatible Drive Type* (See all supported drives) |
- 3.5" SATA HDD
- 2.5" SATA SSD
- M.2 2280 NVMe SSD
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Hot Swappable Drive* |
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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.
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External Ports
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RJ-45 1GbE LAN Port |
2 |
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USB 3.2 Gen 1 Port* |
1 |
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Expansion Port |
1 |
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Expansion Port Type |
eSATA |
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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.
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PCIe
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PCIe Expansion |
1 x Gen3 x2 network upgrade slot |
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Appearance
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Size (Height x Width x Depth) |
166 mm x 106 mm x 223 mm |
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Weight |
1.51 kg |
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Others
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System Fan |
92 mm x 92 mm x 1 pcs |
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Fan Speed Mode |
- Full-Speed Mode
- Cool Mode
- Quiet Mode
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Brightness Adjustable Front LED Indicators |
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Power Recovery |
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Noise Level* |
20.7 dB(A) |
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Scheduled Power On / Off |
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Wake on LAN / WAN |
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Power Supply Unit / Adapter |
65 watts |
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AC Input Power Voltage |
100V to 240V AC |
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Power Frequency |
50/60 Hz, Single Phase |
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Power Consumption |
21.07 watts (Access)
8.62 watts (HDD Hibernation) |
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British Thermal Unit |
71.85 BTU/hr (Access)
29.39 BTU/hr (HDD Hibernation) |
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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%
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Temperature
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Operating Temperature |
0°C to 40°C (32°F to 104°F) |
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Storage Temperature |
-20°C to 60°C (-5°F to 140°F) |
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Relative Humidity |
5% to 95% RH |
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Certification
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- FCC
- CE
- BSMI
- VCCI
- RCM
- UKCA
- EAC
- CCC
- KC
- BIS
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Warranty
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3-year hardware warranty, extendable to 5 years with EW201 |
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Notes |
- The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
- EW201/EW202 is only available in Asia, Africa, and Oceania. Refer to the Extended Warranty website for details on supported countries/regions. (Learn more)
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Environment
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RoHS Compliant |
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Packaging Content
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- 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
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Optional Accessories
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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.
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DSM Specifications
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Maximum Single Volume Size |
108 TB |
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Maximum Internal Volume Number |
64 |
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M.2 SSD Storage Pool Support* |
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SSD Read/Write Cache (Determining cache size) |
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SSD TRIM |
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Supported RAID Type |
- Synology Hybrid RAID
- Basic
- JBOD
- RAID 0
- RAID 1
- RAID 5 (with Expansion Unit)
- RAID 6 (with Expansion Unit)
- RAID 10 (with Expansion Unit)
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RAID Migration |
- Basic to RAID 1
- Basic to RAID 5 (with Expansion Unit)
- RAID 1 to RAID 5 (with Expansion Unit)
- RAID 5 to RAID 6 (with Expansion Unit)
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Volume Expansion with Larger HDDs |
- Synology Hybrid RAID
- RAID 1
- RAID 5 (with Expansion Unit)
- RAID 6 (with Expansion Unit)
- RAID 10 (with Expansion Unit)
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Volume Expansion by Adding a HDD |
- Synology Hybrid RAID
- JBOD (with Expansion Unit)
- RAID 5 (with Expansion Unit)
- RAID 6 (with Expansion Unit)
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Global Hot Spare Supported RAID Type |
- Synology Hybrid RAID (with Expansion Unit)
- RAID 1 (with Expansion Unit)
- RAID 5 (with Expansion Unit)
- RAID 6 (with Expansion Unit)
- RAID 10 (with Expansion Unit)
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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.
- Each internal volume (may consist of multiple drives) is expandable up to 108TB.
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Internal Drives |
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External Drives |
- Btrfs
- ext4
- ext3
- FAT
- NTFS
- HFS+
- exFAT
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File Protocol |
- SMB
- AFP
- NFS
- FTP
- WebDAV
- Rsync
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Maximum Concurrent SMB/AFP/FTP Connections |
500 |
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Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion) |
2,000 |
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Windows Access Control List (ACL) Integration |
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NFS Kerberos Authentication |
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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.
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Maximum Local User Accounts |
2,048 |
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Maximum Local Groups |
256 |
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Maximum Shared Folder |
512 |
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Maximum Shared Folder Sync Tasks |
8 |
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Hybrid Share Folder Number |
10 |
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Data & Folder Backup |
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Entire System Backup |
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Notes |
Full-system backup requires DSM 7.2 or later. |
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Synology High Availability |
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Syslog Events per Second |
800 |
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Virtualization
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VMware ESXi 6.5 and VAAI |
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Windows Server 2022 |
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Citrix Ready |
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OpenStack |
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Supported Protocols |
SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV |
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Supported Browsers |
- Chrome
- Firefox
- Edge
- Safari
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Supported Language |
English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, ???????, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Ceský, ???????, ???, ???, ????, ???? |
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Notes |
For an updated list of supported browser versions, check the DSM Technical Specifications. |
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Suggested Users |
100 |
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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.
- Models with expandable memory are tested with their maximum supported memory.
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Download Station
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Maximum Concurrent Download Tasks |
80 |
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Maximum iSCSI Target Number |
128 |
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Maximum LUN |
256 |
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LUN Clone/Snapshot, Windows ODX |
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Free Email Accounts |
5 (Additional accounts require purchase of licenses) |
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Suggested Users |
500 |
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Notes |
- Suggested users is derived from testing in an environment with 20% heavy users (each with 20,000 pre-populated emails and receiving 240 emails per day) and 80% light users (each receiving an average of 20 emails per day). Learn more
- Models with expandable memory are tested with their maximum supported memory. To estimate the RAM requirement for your NAS, please read this article.
- 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).
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DLNA Compliance |
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Facial Recognition |
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Object Recognition |
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Notes |
Object recognition requires an upgrade of memory capacity to a minimum of 4 GB. |
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Maximum Snapshots per Shared Folder |
1,024 |
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Maximum of System Snapshots |
65,536 |
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Default Licenses |
2 (Additional cameras require purchase of licenses) |
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Suggested Maximum IP Cameras and Total FPS (H.264) |
- 1080p: 40 channels, 800 FPS
- 3M: 35 channels, 350 FPS
- 5M: 28 channels, 280 FPS
- 4K: 17 channels, 170 FPS
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Suggested Maximum IP Cameras and Total FPS (H.265) |
- 1080p: 40 channels, 1200 FPS
- 3M: 40 channels, 600 FPS
- 5M: 40 channels, 480 FPS
- 4K: 20 channels, 200 FPS
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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.
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Recommended Number of Concurrent Sync Clients |
350 (the number of connections that can be maintained when the recommended number of hosted files was reached) |
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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) |
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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.
- Models with expandable memory are tested with their maximum supported memory.
- Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
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Suggested Users |
3,000 |
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Notes |
- Suggested users is derived from testing in an environment with 60% idle users (each logging in and viewing documents) and 40% active users (each executing random actions at intervals of 20 to 40 seconds) operating within documents, each document having 30 users. Learn more
- Models with expandable memory are tested with their maximum supported memory.
- Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
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Recommended Virtual Machine Instances |
4 (Learn more) |
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Recommended Virtual DSM Number (Licenses required) |
4 (including 1 Free License) |
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Notes |
The specifications vary depending on system configuration and memory size. |
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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.