BUFFALO DriveStation Quad 8TB (4 x 2 TB) USB 3.0 High Performance RAID Array with Optimized Hard Drives HD-QH8TU3R5 RAID: RAID System (0, 1, 5, 10) Package Contents: DriveStation Quad USB 3.0 Hard Drive Array, Setup CD-ROM, Quick Setup Guide, USB 3.0 cable, AC Adapter, Warranty Statement