The Western Digital WD400BB 40 GB internal desktop drive is a reliable and high-quality hard drive designed for storage purposes. With a storage capacity of 40 GB, this hard drive is perfect for storing and accessing large amounts of data and files. As an internal desktop drive, it is designed to be installed within a computer's chassis to provide fast and efficient data storage and retrieval. The Western Digital brand is known for its durability and performance, making this hard drive a great choice for anyone in need of additional storage space on their desktop computer.