Synology DX1222 12-Bay Disk Expansion Unit (Diskless)Expand Your Storage Capacity Seamlessly The Synology DX1222 Expansion Unit provides a simple way to add storage to your compatible Synology DiskStation. Scale up your capacity with up to 12 additional drives and manage it all through DSM. Specifications Brand: Synology Model: DX1222 Drive Bays: 12 Drive Size Compatibility: 2. 5" or 3. 5" Compatibility: Expansion for selected Synology DiskStation units Management: Synology DSM Warranty: 5 Year Limited