The HP 581286-S21 is an internal hard drive that comes equipped with a 600 GB storage capacity, which is ideal for storing an array of music, movies, and other important files on a hard disk. This HP 600 GB hard drive features a 600 MBps data transfer rates, which conveniently and quickly allows a person the ability to move files around a computer with ease. This allows for enhanced organization and is useful for accessing entities on the drive itself. The HP 600 GB hard drive has 6.3 cm drive width, which fits in most computer hard drive housings with ease. The HP 581286-S21 is an internal hard drive that has an optimal rotational speed of 10000 RPM and also uses a common SAS 600 interface, which makes it compatible with an array of brands and models. The HP 600 GB hard drive is easy to install and provides the speed, performance, and space needed to efficiently move, access, and store files on a computer.