Synology DX213 delivers an effortless solution for volume expansion & data backup for selected Synology Disk Station models Key Features Online Volume Expansion Dedicated Local Backup Solution Reliable Plug-n-use Design Auto power on/off with Disk Station Models Synology DX213 delivers an effortless solution for volume expansion & data backup for selected Synology Disk Station models. The DX213 seamlessly scales up the storage capacity of the Disk Station 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 Disk Station, Synology DX213 provides an easy way to immediately scale capacity by additional 2 hard drives. The RAID volume on the Synology Disk Station can be expanded directly without having to reformat the existing hard drives, ensuring the Synology Disk Station continues its service during the capacity expansion. Synology DX213 can be used as a dedicated local backup solution for the Synology Disk Station. When created as a separate volume, the Synology DX213 provides a great backup solution to its local hard disks in case of system failure.