This 1 TB hard drive from Buffalo Technology offers a tremendous external and portable means to transfer and store large amounts of data. With a sleek black exterior, the hard drive gives off an air of power which is matched by its internal capacity. Connected to a computer or laptop by USB, the Buffalo Technology HD-PATU3 serves a wide variety of devices and operating systems, including Microsoft Windows XP, Server 2003, Windows 7, Vista, and Server 2008, as well as Apple Mac OS X 10.4 or later. This external hard drive also comes prepackaged with TurboPC software to ensure the features of this hard drive can be fully taken advantage of. Using less than 3.0 watts even at full throttle, the Buffalo Technology HD-PATU3 is energy efficient, a must for travelers or anyone who wants to connect their external hard drive to a laptop, where battery life is critical. This 1 TB hard drive holds the equivalent of one million photographs or a quarter of a million songs, making the Buffalo Technology HD-PATU3 a nearly inexhaustible source of storage and data transfer.