DESC: The 250GB My Passport Essential Portable USB Hard Drive from Western Digital is a portable hard drive in a durable housing, great for use with laptop computers. The drive features an interface that allows it to be connected and powered by USB 2.0, a rotation speed of 5400rpm, a 2MB data buffer and bus transfer rates of up to 60MB/sec. The drive is an excellent storage solution for users who are on the move.