With an enormous storage capacity & an ultra fast connection, the Western Digital My Book Thunderbolt External Hard Drive moves large files at unprecedented speeds; this desktop drive can handle the most demanding users with libraries of media content. Rapid storage This powerful hard drive has been built to keep up with your demanding creative tasks. Ideal for the video editor & digital media creatives, the WD My Book Thunderbolt takes on even more data storage work. The innovative Thunderbolt connection drives rapid data transfer speeds, giving you the fastest possible way to get files to & from your hard drive. A whopping 4 TB of storage space provides masses of space for your data hungry systems. Data security The My Book hard drive features RAID technology, you can select from RAID 0 (striping) & RAID 1 (mirroring). RAID 0 gives you the performance you want when working on intense creative projects such as graphic design & editing. RAID 1 ensures double safety backup by automatically duplicating the data. Just set the system to the data protection mode & the drive will divide the capacity in half, saving data to both drives so you always have a backup. More speed You can even daisy chain several drives together for a faster performance. The rapid Thunderbolt connector provides two channels of up to 10 Gb/s transfer rate in both directions. This gives you uncompromising bandwidth to process file storage at incredible speeds. Enjoy high-speed multitasking during video editing, 3D rendering, graphic intense tasks & everything else. Serviceable If you wish to upgrade the drive, simply open the enclosure & replace your existing drive. Whats more, you can register the drive, run diagnostics, manage RAID or JBOD modes & much more using WD Drive Utilities software. Offering exceptional transfer speeds & a high-capacity storage system, the Western Digital My Book Thunderbolt External Hard Drive delivers the performance youve been waiting for.