The HDD Hard Drive SATA Laptop 2.5" Seagate Momentus ST9640423AS 640GB is a reliable internal laptop drive with a storage capacity of 640GB. It is designed for use with laptops and features a SATA interface for efficient data transfer. The 5400 RPM rotation speed ensures fast data access and retrieval, making it suitable for everyday computing needs. With the Seagate Momentus product line backing it, this hard drive offers dependable storage solution for your digital files and data.