Synology DS425+

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Status: Currently sold

A compact 4-bay NAS from mid-2025 for prosumers, content creators and small businesses. The big change is 2.5GbE networking, and two M.2 NVMe slots add SSD caching or fast storage. The Celeron J4125 has graphics built in that help with Plex transcoding, but RAM tops out at 6 GB, which limits heavier VM or container work.

Series	x25 Series
Bays	4
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	JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10, SHR
RAM (max)	6 GB
Memory slots	1
Memory generation	DDR4
ECC memory	Non-ECC
Replaceable memory	Replaceable
Network ports	1x 2.5GbE + 1x 1GbE
USB ports	2x USB 3.2 Gen 1
PCIe expansion	None
M.2 slots	2
Max raw capacity	96
Drive bay types	3.5" SATA HDD or 2.5" SATA SSD; M.2 2280 NVMe SSD
Hot-swappable bays	Yes
CPU frequency (GHz)	2
Power draw, active (W)	28.25
Power draw, hibernation (W)	6.1
Power supply (W)	90
Noise level (dBA)	21.6
Dimensions H x W x D	6.5 x 7.8 x 8.8 in (166 x 199 x 223 mm)
Weight	4.8 lb (2.18 kg)
Estimated cost to fill every bay with a certified 8 TB drive	about $1,620 new (Synology HAT3310-8T) / about $800 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 $2,776 new (Synology HAT3310-16T) / about $1,596 used (Synology HAT5300-16T) -- one observed eBay unit price incl. shipping x bays; quantity availability unverified

View on Amazon Search eBay (used from $867.17, new from $606.36) Official product page + Compare

29 eBay listings checked Nov 6, 2026 · 16 new, 13 used

Documents

• Datasheet (PDF)
• Product Specifications (PDF)

Compatible Drives

39 drives certified on DS425+'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 DS425+. 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.