BUFFALO DriveStation Duo 6TB (2 x 3TB) USB 3.0 High Performance RAID Array with Optimized Hard Drives HD-WH6TU3R1 RAID: RAID System (0, 1) Weight: 6.55 Package Contents: DriveStation Duo USB 3.0 Hard Drive Array, Setup CD-ROM, Quick Setup Guide, USB 3.0 cable, AC Adapter, Warranty Statement