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Compact two-bay desktop NAS in matte black finish

Synology Inc.

Synology Inc. DS725+ 2-bay NAS 4GB DDR4

SKU CH-Y4RA-M00KH MPN DS725+

Two-bay desktop NAS with AMD Ryzen R1600 processor, 4 GB DDR4 ECC memory, built-in 2.5GbE and USB 3.2 port, supporting up to 36 TB across RAID 0, 1, 5, 6, 10 or JBOD

  • CPUAMD Ryzen R1600
  • Form factor2-bay;4 GB DDR4
  • USB ports1 x USB3.2
  • Drive interface2 x SATA (2 x Bay)
  • Installed RAM4 GB DDR4 ECC SODIMM
  • Maximum RAM capacity32 GB (16 GB x 2)

Model DS725+

  • Dependable performance with up to 276 MB/s sequential read throughput
  • Fast networking via built-in 2.5GbE port for high-speed connectivity
  • Versatile storage with RAID 0, 1, 5, 6, 10 and JBOD support
  • Expandable memory up to 32 GB using two DDR4 SODIMM slots
  • High capacity potential supporting up to 36 TB across two drive bays

What this NAS delivers

The Synology DS725+ is a two-bay desktop network storage system sold without drives. It ships with 4 GB of DDR4 ECC memory installed and an AMD Ryzen R1600 processor, providing a compact platform for file sharing, media streaming and backup tasks. The unit includes a single USB 3.2 port and a built-in 2.5 GbE network connection.

Who should consider it and who should not

This model suits home users and small offices that want a quiet, low-power device for centralised storage and Synology DSM applications. Buyers needing more than two drive bays, higher raw throughput than 276 MB/s sequential read, or 10 GbE networking out of the box should look at larger rackmount or multi-bay alternatives.

The spec that decides fit

Maximum raw capacity is 36 TB across the two SATA bays, so the total storage ceiling is fixed by the bay count and the largest supported drives. Memory can be expanded to 32 GB using two DDR4 SODIMM slots if workloads demand more RAM.

How it compares

Measured against everything we stock in Multi-Bay Desktop NAS, at today’s prices. Recalculated every night.

Price $484.99
Cheaper than about 56% of the 230 comparable items (median $562.49).

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Specifications

Product
Brand nameSynology
Product lineDiskStation
Model nameDS725+
Part numberDS725+
Product typeDesktop NAS
Recommended useBackup & stream media through personal cloud
Processor
CPUAMD Ryzen R1600
Memory
Installed RAM4 GB DDR4 ECC SODIMM
Maximum RAM capacity32 GB (16 GB x 2)
RAM slots2 x DDR4 SODIMM
Storage
Drive interface2 x SATA (2 x Bay)
Drives includedDiskless System
Supported RAID modes0, 1, 5, 6, 10, and JBOD
Connectivity
Protocol supportSMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS
Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP,
CalDAV
Ports & slots
USB ports1 x USB3.2
Power
Power details100 V to 240 V AC,50/60 Hz, Single Phase
Size & build
Form factor2-bay;4 GB DDR4
Product dimensions11.18 in × 10.63 in × 4.72 in
Product weight5.49 lb (2.49 kg)
Shipping weight2.40 kg
Package size279 × 279 × 127 mm
In the box
In the boxMain Unit X 1
Accessory Pack X 1
AC Power Adapter X 1
AC Power Cord X 1
RJ-45 LAN Cable X 2
Environment & compliance
Temperature rangeOperating Temperature 0 °C to 40 °C (32 °F to 104 °F)
Storage Temperature -20 °C to 60 °C (-5 °F to 140 °F)
Humidity range5% to 95% RH
More details
Maximum capacity36 TB

Other versions of this model

5 more in the same range

Questions about this item

How much DDR4 ECC SODIMM memory can I add to the two slots later?

The DS725+ supports up to 32 GB total using two 16 GB DDR4 ECC SODIMM modules, doubling the factory 4 GB.

What throughput ceiling will the single 2.5GbE port hit during long transfers?

Sequential reads reach 276 MB/s and writes 224 MB/s, so sustained traffic saturates around the 2.5 GbE link speed.

How loud and hot does the unit get when running 24/7 in a 25 °C room?

Operating range is 0 °C to 40 °C; the AMD Ryzen R1600 and dual-bay chassis stay within spec with standard fan cooling.

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