to turn your 2.5" notebook hard drive into a portable audio/video player.can play movies, music, or a slideshow of your pictures when connected to AV inputs on any televison. Also, since it utilizes high speed USB 2.0, you can get your data from your computer to your 2.5" hard drive up to 40 times faster than USB 1.1. And since it also doubles as a portable enclosure, you can store your documents, programs, or any other data on the hard player. Capacity 40 GB, 80 GB , 100 GB