The WD5000AAKX 500GB 7200 RPM SATA 3.5 Inch Desktop Hard Drive is a reliable internal hard disk drive suitable for PCs. With a storage capacity of 500GB and a rotation speed of 7200 RPM, this Western Digital drive offers fast read speed of up to 500MB/s. This HDD is designed for desktop use and features a cache size of 16 MB. The blue-colored WD Blue product line ensures high performance and durability, making it a great choice for expanding storage capacity on your computer system.