The drive is powered by the USB 3.0 bus and Seagate promises transfer speeds as high as 220 MB per second that make the Backup Plus Fast a perfect choice for field photographers or filmmakers.
http://www.notebookcheck.net/Seagate-unveils-the-Backup-Plus-Fast-external-drive-with-dual-2-TB-drives-in-RAID-0.108469.0.html