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White rectangular desktop NAS with four drive bays and front status LEDs

Synology Inc.

Synology Inc. DS425+ 4-bay NAS 2GB DDR4

SKU CH-2DK5-PKN5M MPN DS425+

A four-bay desktop NAS with an Intel Celeron J4125 processor, 2 GB DDR4 memory expandable to 6 GB, one 2.5GbE and one 1GbE port, two USB 3.2 Gen 1 ports, and M.2 NVMe slots for SSD cache

  • CPUIntel Celeron J4125
  • Form factor4-bay;2 GB DDR4 non-ECC
  • Port count2 x USB 3.2 Gen 1 ports
  • Drive interface4 x SATA (4 x Bay)
  • Installed RAM4-bay;2 GB DDR4
  • Maximum RAM capacity6 GB (2 GB + 4 GB)

Model DS425+

  • Four drive bays for flexible storage capacity
  • Dual LAN with 2.5GbE and 1GbE ports
  • M.2 NVMe slots enable SSD caching
  • Memory expandable to 6 GB via DDR4 SODIMM
  • Diskless design lets you choose your own drives

Four-bay desktop NAS with dual LAN

The Synology DS425+ is a diskless four-bay desktop NAS powered by an Intel Celeron J4125 processor and 2 GB of DDR4 memory. It provides two USB 3.2 Gen 1 ports, one 2.5 GbE and one 1 GbE RJ-45 port, plus built-in M.2 NVMe slots for SSD cache. The unit supports SMB, NFS, iSCSI and other common file protocols for backup and media streaming.

Suits home users and small offices needing

This NAS fits users who want a compact, quiet appliance for personal cloud backup, media streaming and file sharing across Windows, macOS and Linux clients. The 2 GB of soldered memory plus one SODIMM slot allows expansion to 6 GB for heavier workloads. Buyers who require 10 GbE connectivity out of the box or more than four drive bays should consider other models.

Bundled cables and power gear enable immediate setup

The package includes the main unit, an accessory pack, an AC power adapter, an AC power cord and two RJ-45 LAN cables. These items let you connect both network ports and power the device without extra purchases. No drives are included, so you must supply your own SATA hard drives or SSDs to begin storing data.

How it compares

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

Price $456.99
Cheaper than about 58% of the 230 comparable items (median $562.49).

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Specifications

Product
Brand nameSynology
Product lineDiskStation
Model nameDS425+
Product typeDesktop NAS
Recommended useBackup & stream media through personal cloud
Processor
CPUIntel Celeron J4125
Memory
Installed RAM4-bay;2 GB DDR4
Maximum RAM capacity6 GB (2 GB + 4 GB)
RAM slots2 x DDR4 SODIMM
Storage
Drive interface4 x SATA (4 x Bay)
Drives includedDiskless System
Connectivity
Protocol supportSMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS
Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP,
CalDAV
Ports & slots
Port count2 x USB 3.2 Gen 1 ports
Power
Power details100 V to 240 V AC
Size & build
Form factor4-bay;2 GB DDR4 non-ECC
Product dimensions11.26 in × 9.45 in × 10.08 in
Product weight7.72 lb (3.5 kg)
Shipping weight3.63 kg
Package size284 × 259 × 241 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

Other versions of this model

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Questions about this item

Which SATA hard drives or SSDs do I need to install before the DS425+ can store any data?

The unit ships diskless, so you must supply up to four 3.5" or 2.5" SATA drives that will occupy the four drive bays.

Will my existing 1 GbE switch limit the 2.5 GbE port on the DS425+?

The 2.5 GbE port will negotiate down to 1 GbE when connected to a 1 GbE switch, while the second RJ-45 port already runs at 1 GbE.

How can I confirm the M.2 NVMe SSD cache is active after I install it?

Open DSM Storage Manager, select the SSD Cache section, and verify the installed M.2 NVMe modules show a "Normal" status with read/write cache enabled.

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