The Western Digital WD Blue WD6400AAKS 640 GB SATA II 3.5 in Hard Drive is a high-quality internal desktop drive designed for use with PCs. With a storage capacity of 640 GB and a rotation speed of 7200 RPM, this hard drive offers reliable and fast performance for storing and accessing data. Its sleek silver color and compact 3.5-inch form factor make it a stylish and practical storage solution for any desktop computer. Made by the trusted brand Western Digital, this HDD is a reliable choice for expanding the storage capacity of your system.