Expandable 2-bay business NAS
Synology DiskStation DS725+ 2-Bay Diskless NAS
The Synology DiskStation DS725+ is an expandable two-bay NAS with an AMD Ryzen R1600 processor, 4 GB ECC memory, built-in 2.5GbE and 1GbE networking, two M.2 NVMe slots and DX525 expansion support.
- Processor
- AMD Ryzen R1600
- Memory
- 4 GB DDR4 ECC
- Storage
- 2 bays + 2 M.2 slots
- Networking
- 1 × 2.5GbE + 1 × 1GbE
Compact storage that can expand with changing needs
The Synology DiskStation DS725+ combines a small desktop footprint with ECC memory, two SATA bays, M.2 NVMe options and support for a five-bay DX525 expansion unit. It is designed for file services, backup, synchronisation and surveillance where a compact system is preferred without giving up a future capacity path.
Expandable capacity
Add one DX525 expansion unit to scale from two to seven drive bays.
ECC memory
The included 4 GB ECC SODIMM supports a stated maximum of 32 GB.
Mixed network speeds
One 2.5GbE port and one 1GbE port support flexible network integration.
M.2 NVMe options
Two internal M.2 slots support compatible NVMe SSD deployment for cache or storage pools.
Backup and sharing
DSM applications support endpoint protection, file services and multi-site synchronisation.
Surveillance management
The current positioning supports management of up to 40 IP cameras, subject to licences and configuration.
Who is the Synology DiskStation DS725+ best for?
A strong choice for
- Small businesses needing expandable storage
- Home offices with growing data
- Private cloud file sharing
- Multi-endpoint backup
- Compact edge deployments
- Surveillance projects requiring up to 40 recommended cameras
Consider another model if you need
- You need more than seven total drive bays
- You require built-in dual 2.5GbE
- You need a PCIe network-card slot
- You prefer a non-expandable lower-cost two-bay model
Key specifications
- CPU
- AMD Ryzen R1600, 2-core
- Memory
- 4 GB DDR4 ECC SODIMM
- Maximum memory
- 32 GB
- Drive bays
- 2; up to 7 with DX525
- M.2 slots
- 2 × M.2 2280 NVMe
- Networking
- 1 × 2.5GbE + 1 × 1GbE
- USB
- 1 × USB 3.2 Gen 1
- Dimensions
- 166 × 106 × 223 mm
- Weight
- 1.51 kg
- Warranty
- 3 years, extendable to 5 years
Full technical specifications
Processor, memory and storage
| CPU model | AMD Ryzen R1600 |
|---|---|
| CPU quantity | 1 |
| CPU cores | 2 |
| CPU threads | 4 |
| CPU architecture | 64-bit |
| CPU frequency | 2.6 GHz base / 3.1 GHz turbo |
| Hardware encryption engine | Supported |
| System memory | 4 GB DDR4 ECC SODIMM |
| Pre-installed memory | 4 GB (4 GB × 1) |
| Memory slots | 2 |
| Maximum memory capacity | 32 GB (16 GB × 2) |
| Drive bays | 2 × 3.5-inch SATA HDD or 2.5-inch SATA SSD |
| Maximum drive bays with expansion | 7 (DX525 × 1) |
| Maximum raw capacity guidance | Up to 168 TB raw with expansion using 24 TB drives |
| M.2 drive slots | 2 × M.2 2280 NVMe |
| Supported drive types | 3.5-inch SATA HDD, 2.5-inch SATA SSD and M.2 2280 NVMe SSD |
| Hot-swappable SATA drives | Supported |
| M.2 hot swap | Not supported |
Network, ports and expansion
| 1GbE RJ-45 ports | 1 |
|---|---|
| 2.5GbE RJ-45 ports | 1 |
| USB 3.2 Gen 1 ports | 1 |
| Expansion port | 1 × USB Type-C expansion port |
| 1GbE maximum MTU | 1,500 bytes |
Physical, power and environment
| Dimensions (H × W × D) | 166 × 106 × 223 mm |
|---|---|
| Weight | 1.51 kg |
| System fan | 92 × 92 mm × 1 |
| Fan modes | Full-Speed, Cool and Quiet |
| Adjustable front LED brightness | Supported |
| Power recovery | Supported |
| Scheduled power on/off | Supported |
| Wake on LAN/WAN | Supported |
| Noise level | 17.9 dB(A) |
| Power supply / adapter | 65 W |
| AC input | 100V to 240V AC |
| Power frequency | 50/60 Hz, single phase |
| Power consumption — access | 20.41 W |
| Power consumption — HDD hibernation | 7.87 W |
| British thermal unit — access | 69.61 BTU/hr |
| British thermal unit — HDD hibernation | 26.84 BTU/hr |
| 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 |
Warranty, compliance and package contents
| Warranty | 3-year hardware warranty, extendable to 5 years with EW201 or Extended Warranty Plus |
|---|---|
| Environmental compliance | RoHS compliant |
| Certifications | FCC, CE, BSMI, VCCI, RCM, UKCA, EAC, CCC, KC and BIS |
| Package contents | Main unit × 1, accessory pack × 1, AC power adapter × 1, AC power cord × 1 and RJ-45 LAN cable × 2 |
Frequently asked questions about the Synology DiskStation DS725+
What is the Synology DiskStation DS725+?
It is an expandable two-bay diskless NAS for file storage, backup, sharing and supported surveillance workloads.
Which processor does the DS725+ use?
The DS725+ uses a two-core AMD Ryzen R1600 with four threads.
How much memory does the DS725+ include?
It includes 4 GB DDR4 ECC SODIMM memory and supports up to 32 GB.
How many drive bays does the DS725+ have?
It has two SATA bays and can expand to seven total bays with one DX525 expansion unit.
Does the DS725+ include M.2 slots?
Yes. It includes two M.2 2280 NVMe slots for compatible SSD cache or storage-pool use.
What network ports are built into the DS725+?
It includes one 2.5GbE RJ-45 port and one 1GbE RJ-45 port.
What transfer performance is stated for the DS725+?
Synology states over 276 MB/s sequential read and 224 MB/s sequential write in its test configuration.
Are drives included with the DS725+?
No. The NAS is diskless, and compatible SATA and M.2 drives are sold separately.
What are the DS725+ dimensions?
It measures 166 × 106 × 223 mm and weighs 1.51 kg without drives.
What warranty applies to the DS725+?
It includes a three-year hardware warranty, extendable to five years through eligible Synology options.
- This listing is diskless; compatible drives and the DX525 expansion unit are sold separately.
- The 168 TB figure uses seven 24 TB drives; usable capacity depends on RAID and system configuration.
- M.2 hot swap is not supported, and exact SSD functions depend on current compatibility.
- Performance and camera figures are based on Synology test or planning conditions.
