Synology DS225+

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Status: Currently sold

A 2-bay desktop NAS from 2025 that replaces the DS224+, aimed at home and home-office backups and private cloud. The upgrade is 2.5GbE networking on the same quad-core Celeron J4125, with 2 GB of RAM (up to 6 GB). There are no M.2 or PCIe slots, so what you buy is what you get.

Series	x25 Series
Bays	2
CPU	Intel Celeron J4125
Cores / Threads	4 / 4
RAM	2 GB
CPU architecture	x86_64
Support tier	full
Warranty (years)	3
Release year	2025
RAID levels	Basic, JBOD, RAID 0, RAID 1, SHR
RAM (max)	6 GB
Memory slots	1
Memory generation	DDR4
ECC memory	Non-ECC
Memory module type	SODIMM
Replaceable memory	Replaceable
Network ports	1x 2.5GbE + 1x 1GbE
USB ports	2x USB 3.2 Gen 1
PCIe expansion	None
M.2 slots	None
Max raw capacity	40
Drive bay types	3.5" SATA HDD or 2.5" SATA SSD
Hot-swappable bays	Yes
CPU frequency (GHz)	2
Power draw, active (W)	16.98
Power draw, hibernation (W)	6.08
Power supply (W)	60
Noise level (dBA)	19.6
Dimensions H x W x D	6.5 x 4.3 x 9.1 in (165 x 108 x 232.2 mm)
Weight	2.9 lb (1.3 kg)
Estimated cost to fill every bay with a certified 8 TB drive	about $810 new (Synology HAT3310-8T) / about $400 used (Synology HAT5310-8T) -- one observed eBay unit price incl. shipping x bays; quantity availability unverified
Estimated cost to fill every bay with a certified 16 TB drive	about $1,388 new (Synology HAT3310-16T) / about $798 used (Synology HAT5300-16T) -- one observed eBay unit price incl. shipping x bays; quantity availability unverified

View on Amazon Search eBay (used from $388.74, new from $364.99) Official product page + Compare

69 eBay listings checked Nov 6, 2026 · 57 new, 12 used

Documents

• Datasheet (PDF)
• Product Specifications (PDF)

Compatible Drives

39 drives certified on DS225+'s official manufacturer compatibility list, sourced directly from Synology's own published Hardware Compatibility List. Each model links to that drive's own compatibility page.

Certified list last checked 2026-08-18.

Compatible Memory

1 memory module listed by Synology as compatible with DS225+. Third-party modules may also work, but are not shown here unless Synology itself lists them as compatible.

Certified list last checked 2026-09-16. Coverage varies by model. Rated module speed is not a guarantee of NAS operating speed; follow the NAS maximum capacity and installation rules.

Looking for cameras compatible with Synology NAS units? See the full Synology camera compatibility database.