Verbatim Titan XS 500 GB USB 2.0 Portable External Hard Drive with Rugged Rubber Casing 97179 (Black) Industries smallest hard drive (5.2 x 7 x 1.87) Outfitted with a shock-resistant rubber casing Windows and Mac compatible Bonus Norton Online Backup (5GB) and eMusic offer of 35 MP3s Data Transfer Rate - USB 2.0 High-Speed: 480 Mb/s (max), USB 1.1 Full Speed: 12 Mb/s