Expansion Unit RX415

Volume Expansion & Backup

When running out of hard drive capacity on the Synology RackStation, Synology RX415 provides an easy way to immediately scale capacity by additional 4 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.

The Synology RX415 can be used as a dedicated local backup solution for the Synology DiskStation.  When created as a separate volume, the RX415 provides a great backup solution to its local hard disks in case of failure.

Reliable Plug-n-use Design

RX415 securely connects to Synology’s 1U RackStation servers with a specially designed eSATA cable, ensuring easy connection and maximum data throughput. With its exceptional 12-inches short-depth chassis design, RX415 can be deployed in both industrial standard environments and smaller server rooms with limited space. Optional Synology Rail Kits are also available for easy system maintenance.


  • Plug-and-Use Design for seamless storage space upgrade
  • Online volume expansion
  • 12-Inch depth to fit in 2-post Racks and Wall Mount Cabinets
  • Energy Saving “Deep Sleep” mode
  • Managed from Synology DiskStation Manager (DSM)

Synology Expansion Unit RX415