Expansion Unit for Increasing Capacity of the Synology DiskStation Synology DX213 delivers an effortless solution for volume expansion and data backup for selected Synology DiskStation models. The DX213 seamlessly scales up the storage capacity of the DiskStation by additional 2 hard drives on-the-fly when connected directly to an expansion cable. Volume Expansion & Backup When running out of hard drive capacity on the Synology DiskStation, Synology DX213 provides an easy way to immediately scale capacity by additional 2 hard drives. The RAID volume on the Synology DiskStation can be expanded directly without having to reformat the existing hard drives, ensuring the Synology DiskStation continues its service during the capacity expansion. Synology DX213 can be used as a dedicated local backup solution for the Synology DiskStation. When created as a separate volume, the Synology DX213 provides a great backup solution to its local hard disks in case of system failure. Reliable Plug-n-use Design The Synology DX213 is connected to the Synology DiskStation using an expansion cable with custom-designed connectors on both ends, ensuring a reliable connection and maximum throughput. The 3.0 Gb/sec connection speed allows the hard drives in the connected Synology DX213 to operate as the internal ones of Synology DiskStation. Green & Easy to Manage model : ADATA XPG SX6000 Lite 512GB PCIe 3D NAND PCIe Internal Solid State Drive tag : NAS