Synology DS1525+ is a versatile 5-bay storage solution that scales with your needs, with support for storage expansion,1 10GbE networking,2 and SSD caching3. Built-in 2.5GbE networking provides excellent networking performance out of the box. Powered by Synology DiskStation Manager (DSM), this device is a flexible all-in-one solution for data sharing, synchronization, backup, andsurveillance. NOTE - COMPATIBLE SYNOLOGY HDDs REQUIRED