The Seagate 3.5" ST4000DM000 4TB SATA III 6Gbps hard drive is a reliable and high-capacity internal desktop drive designed for use with PCs. With a rotation speed of 5900 RPM and a cache size of 64 MB, this Seagate Barracuda drive provides fast data transfer rates and ample storage space for all your needs. Made in Thailand, this HDD-only drive is compatible with SATA III interfaces and offers a storage capacity of 4TB, making it a great choice for those looking to expand their storage capabilities.