Synology
Synology 5-Bay Expansion Unit DX525 (Diskless)
Bottom line: The Synology 5-Bay Expansion Unit DX525 is a specs-and-price decision rather than a crowd-consensus one in the external storage category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.
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Pros & Cons
Pros
- ✓ Supports drives on the model's official compatibility list
- ✓ Backed by Synology's warranty and support channels
Cons
- ✗ Check the listed dimensions, connectors and platform compatibility against your setup before ordering
- ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated
Manufacturer description
The Synology DX525 allows users to easily add up to five 2.5-inch or 3.5-inch drives to their setup, thanks to its straight forward installation process and DSM’s intuitive volume management software.
SpecPicks Verdict
SpecPicks scored Synology 5-Bay Expansion Unit DX525 using a rating × review-volume × price-fit model applied to published specs and reviews across the external storage category. Synology's external storage lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for external storage of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Key Features
- Supports drives on the model's official compatibility list
- Add 5 additional 3.5"/2.5" SATA HDD/SSD to your DiskStation.
- Configure new storage in minutes with Synology DSM's unified toolsA
- Backed by Synology's 3-year limited hardware warranty
- Plug-and-play compatibility and support for hot-swapping drives
Full Specifications
| Size | 166 mm x 230 mm x 223 mm |
|---|---|
| Brand | Synology |
| Color | Black |
| Material | Metal, Plastic |
| Unit Count | 1 Count |
| Model Number | DX525 |
| Mounting Type | Tabletop |
| Mfr Part Number | DX525 |
| Compatible Devices | Desktop, Server |
| Enclosure Material | Metal, Plastic |
| Warranty Description | 3 Year |
| Item Dimensions D x W x H | 8.78"D x 9.06"W x 6.54"H |
Ready to buy?
Synology 5-Bay Expansion Unit DX525 (Diskless) is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
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