TOSHIBA 320GB USB 2.0 Portable External Hard Drive TOSHIBA 320GB USB 2.0 Portable External Hard Drive. Sleek and stylish, Toshibas 2.5 Inch External HDD captures the essence of todays fast paced digital lifestyle. It is the must have accessory for a new mobile generation of consumers who take their digital work and entertainment wherever they go. And Toshiba lets them do just that. With up to 320 GB, they can take thousands of songs, pictures, movies and work files on the road. Quickly, easily, and securely. Toshibas external hard drives are a hasslefree, simple and easy solution to all your backup needs. Our drives help take the mystery out of backing up your most precious digital memories by combining our most reliable hard drive technology with easy to use backup software. Our drives are USB powered and include an internal shock sensor and ramp loading technology to help keep your drive safe and your data mobile. Ready to go out of the box and certified to work with Windows XP and Vista as well as Mac OS 10.3.9 or later.