G-RAID with removable drives. RAID 0/1 solution with USB 3.0, eSATA, and FireWire ; 2-removable 7200RPM hard drives for performance; Up to 8TB storage capacity perfect for photo & video editing ; Smart-cooling fan for quiet operation, long life and data reliability ; Software selectable RAID 0 (performance) or RAID 1 (protection) ; Solid and durable all-aluminum enclosure ; Works with Time Machine; easily reformatted for Windows; 3-year limited warranty