Synology

Synology DS425+ 4-Bay Desktop NAS Enclosure

A four-bay desktop NAS that pairs a quad-core Celeron J4125 with a 2.5 GbE port and dual NVMe slots for faster everyday storage

$1,899.00*
In Stock on Amazon.com
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*Price sourced from Amazon.com. Last updated:Jul 30, 2026.Price and availability are subject to change.

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Overview

The Synology DS425+ is the newest four-bay entry in the company's Plus series, and it targets buyers who want centralized storage with room to grow. At its heart sits an Intel Celeron J4125 quad-core processor, a familiar low-power chip that handles file serving, backups, and light application workloads. This listing pairs the enclosure with 16TB of capacity using Synology's HAT3300-4T drives, which means it lands on the desk as a complete package rather than a shell awaiting disks. It suits home offices, small creative teams, and enthusiasts who have outgrown a two-bay unit.

Construction follows the established Plus-series desktop form factor, with four bays up front and expansion options that punch above the price. The system starts with 2GB of DDR4 non-ECC SODIMM memory and accepts a single 4GB D4NS01-4G module to reach 6GB total. Two M.2 2280 NVMe slots sit ready for caching or for building a separate flash storage pool, a practical touch for anyone who works with lots of small files. Connectivity comes by way of one 2.5 GbE and one 1 GbE RJ-45 LAN port, giving the faster clients on a network a quicker lane while keeping a second connection available. Taken together, the DS425+ reads as a sensible, well-rounded desktop NAS with a handful of forward-looking extras.

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 Memory
2GB DDR4 Non-ECC SODIMM
Maximum Memory
6GB (with additional 4GB module)
Supported Memory Module
D4NS01-4G
M.2 Slots
Two M.2 2280 NVMe (caching or storage pool)
Network Ports
1 x 2.5 GbE and 1 x 1 GbE RJ-45
Included Storage
16TB (Synology HAT3300-4T)

Frequently Asked Questions

This configuration includes 16TB of storage using Synology's HAT3300-4T drives, so it arrives ready to populate rather than as a bare enclosure.
It ships with 2GB of DDR4 non-ECC SODIMM and expands to 6GB total by adding a single 4GB D4NS01-4G module in the available slot.
It has two RJ-45 LAN ports: one 2.5 GbE for faster throughput and one 1 GbE, so capable clients and switches can benefit from the quicker port.
Yes. Two M.2 2280 NVMe slots let you set up SSD caching or create a dedicated flash storage pool, depending on your workload.
An Intel Celeron J4125 quad-core processor, an entry-level low-power chip suited to file serving, backups, and light application workloads.
Four bays, placing it in the mid-range desktop NAS class as the newest four-bay model in Synology's Plus series.