Storage expansion without downtime
Easily add five additional drive bays to your Synology DiskStation.1 The DX525 supports both 2.5\" and 3.5\" SATA drives and features plug-and-play setup and hot-swap capability for uninterrupted operation during capacity expansion.

Dedicated local backup solution
The Synology DX525 provides a dedicated local backup solution for your Synology DiskStation. When configured as a separate volume, it safeguards data on its local disks in case of system failure.

Online volume expansion
Managed through the host NAS's DiskStation Manager (DSM), the DX525's additional bays are immediately available upon connection. On-the-fly volume expansion ensures uninterrupted service and storage expansion on the host.

Performance backed by Synology drives
Designed for Synology systems, Synology drives deliver consistent performance and unmatched reliability for your deployments.

Synology has you covered
The DX525 is backed by Synology's three-year limited warranty,2,3 including technical support and hardware replacement services. Extend your coverage to five years and gain access to premium services that accelerate recovery in the event of a disaster with Extended Warranty Plus.