Synology 5-bay SATA expansion unit for DS725+DS. 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. 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. 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. Designed for Synology systems, Synology drives deliver consistent performance and unmatched reliability for your deployments. The DX525 is backed by Synology's three-year limited warranty, 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. The new 5-bay expansion units for 25-series desktop models. The expansion port will be connected through Type-C expansion cable with the 25 series DS Plus models. DX525 has side-band management mechanism, LED brightness control functionality can be configured through host's DSM UI and reduced power consumption during Deep Sleep. Works only with compatible drives. Please refer to Synology's compatibility list to check supported models.