The HD-GDU3's 1GB DRAM cache and USB 3.1 (Gen 1 Type-A) interface let you transfer files faster than ever. The TurboPC EX utility kicks it up even more, resulting in the world's fastest USB 3.1 Gen 1 hard disk drive; copies 1,000 photos in just 3.5 seconds! An excellent choice for video, audio, and graphics professionals, business users, or anyone needing to transfer larger amounts of data fast and reliably, this unit vastly reduces the time needed to save and copy data, meaning greater efficiency and less stress, even with frequent backups of work documents and other important data. In addition to speed, you also get capacity, with 1, 2 and 3TB models. The unit also includes a wealth of convenient features-not useless clutter, but powerful tools to increase efficiency, save energy, and make tasks easier.