Storage expansion without downtime

Easily add five additional drive bays to your Synology DiskStation. 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.

Hard drives designed for Synology

See how Synology hard drives deliver reliability, consistent performance, and simplified system management through deep hardware-software integration.

• Expansion Unit DX525
• 1 x Expansion Cable: USB Type-C
• 1 x Accessory Pack
• 1 x AC Power Adapter
• 1 x AC Power Cord