The 1TB/2TB Elements Portable Hard Drive from WD quickly and efficiently transfers even the largest files with USB 3.0 connectivity. The integrated USB 3.0 connection provides data speeds up to 5 Gb/s while remaining backwards compatible with USB 2.0 ports. This plug-and-play drive comes NTFS formatted for a seamless connection to PCs running Windows 8, Windows 7, Windows Vista, and Windows XP; and requires reformatting to work with Mac computers.