Massive Capacity: The My Book™ Duo drive has up to 36TB capacity with a single cable. Free up valuable space on all your computers. Store and back up your photo, video and music collections, and important documents in one reliable place. RAID-0 Ready Out of the Box: Ready to perform at maximum speed and capacity in default mode, RAID-0. Reconfigure the drive to RAID-1 for redundancy (data mirroring), or use it as two independent drives (JBOD) with the included WD Drive Utilities™ software. RAID-Optimized WD Drives: The My Book™ Duo drive comes with RAID-optimized WD drives inside to deliver high-speed, quality storage to rely on. RAID-optimized firmware is perfect for two-disk array systems with auto management of drive operations to help ensure read/write cycle data integrity.