This Western Digital 500GB hard drive is a powerful unit for any laptop, Mac or PC. With a rotation speed of 7200 RPM, it boasts a read speed of 180MB/s and a transfer rate of 6 GB/s. The unit has a form factor of 2.5 inches and a cache of 64 MB. The hard drive has a storage capacity of 500 GB and supports only HDD storage format. It comes with Dynamic Cache, High Performance, and NoTouch Ramp Load Technology features. This hard drive is compatible with SATA I interface and has a product line of WD Black. It is compact, with a length of 9.91 cm and a width of 7.11 cm, and a height of 0.76 cm.