The WD Elements 1TB Portable External Hard Drive features a flexible interface with fast transfer speeds. This device provides you with a place to store your music, songs, videos and photos. The WD Elements 1TB external hard drive will hold up to 666,000 photos, up to 285,000 songs or up to 56 hours of HD video. This external hard drive is compatible with Windows XP, Vista and Windows 7 and 8. It is also compatible with Mac OS X once required formatting has been completed. This product comes with a convenient quick start guide, a USB cable, a power adapter and the hard drive.