The Fantom Drives G-Force 3, product number GF3B3000U, is a 3 GB external hard drive. It weighs 2.4 lbs and measures 7.8 inches wide by 4.5 inches high by 1.4 inches thick. The Fantom Drives 3 TB hard drive has a spindle speed of 7200 RPM and a maximum data transfer rate of 5 Gbps. It comes pre-formatted as NTFS and will need to be re-formatted for use with machines running a Mac operating system. This external hard drive features a fan-free design for silent operation in an aluminum enclosure. The Fantom Drives 3 TB hard drive offers plug-in-play functionality, making it ready for use just out of the box without any software installation required. Connectivity for the Fantom Drives 3 TB hard drive is available via USB 3.0 and is backwards compatible to USB 2.0. This drive is works with machines running Windows Vista, 7, and Windows Server 2003 or 2008. The Fantom Drives G-Force 3 can also be used with machines running Mac OS X 10.5 or newer as well.