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Synology
Synology DS425+ 4-Bay Desktop NAS with 32TB Storage
A four-bay Plus-series NAS that pairs 32TB of Synology storage with 2.5 GbE networking and dual NVMe slots for caching flexibility
$3,499.00*
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*Price sourced from Amazon.com. Last updated:Aug 01, 2026.Price and availability are subject to change.
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Overview
Key Features
New model of the Plus series with 4 bays and an Intel Celeron J4125 quad-core processor
· 2GB DDR4 Non-ECC SODIMM (upgradable to 6GB with an additional 4GB module)
· Supports new memory module: D4NS01-4G
· 1 × 2.5 GbE and 1 × 1 GbE RJ-45 LAN ports
· Two M.2 2280 NVMe slots for caching or storage pool creation
Specifications
Brand
Synology
Model
DS425+
Series
Plus series
Form Factor
4-bay desktop NAS
Processor
Intel Celeron J4125 quad-core
Included Storage
32TB (Synology HAT3310-8T drives)
Memory
2GB DDR4 non-ECC SODIMM
Maximum Memory
6GB (with additional 4GB D4NS01-4G module)
Compatible Memory Module
D4NS01-4G
Network Ports
1 × 2.5 GbE and 1 × 1 GbE RJ-45
M.2 Slots
Two M.2 2280 NVMe (caching or storage pool)
Frequently Asked Questions
How much storage does the Synology DS425+ come with out of the box?
This configuration includes 32TB of capacity supplied by Synology's own HAT3310-8T drives across its four bays, so it is ready to set up without buying disks separately.
Can I upgrade the memory in the DS425+ and how far?
Yes. It starts with 2GB of DDR4 non-ECC SODIMM and upgrades to 6GB total by adding a compatible 4GB D4NS01-4G module.
Does the DS425+ support faster-than-gigabit networking?
It does. The unit includes one 2.5 GbE RJ-45 port alongside a standard 1 GbE port, so networks with 2.5 GbE equipment can exceed gigabit speeds.
What can I do with the two M.2 NVMe slots?
The two M.2 2280 NVMe slots can be used for SSD caching to speed up frequently accessed files or configured as a separate NVMe storage pool.
What processor powers the DS425+?
It runs on an Intel Celeron J4125 quad-core processor, which handles file serving, backups, and lightweight applications for home and small-office use.
Is the DS425+ part of Synology's Plus series?
Yes, it is a new model in the Plus series and features four drive bays, positioning it above entry-level Synology units in capacity and expandability.