My Book Thunderbolt™ Duo with up to 8TB of capacity is a dual-drive storage system featuring Thunderbolt™ technology that sets new standards for data transfer speeds and workflow flexibility, and offers creative professionals unsurpassed performance in a high-capacity, RAID-enabled solution. Thunderbolt technology lets creative pros design, edit, render and produce graphics, movies, music and more in record time. And the revolutionary bi-directional Thunderbolt™ technology delivers unmatched speed for multi-tasking while video editing, 3D rendering and completing other graphics-intensive projects. Customize this dual-drive storage system to your needs – RAID 0 for speed, RAID 1 for data protection or JBOD to use the drives individually.