The Hitachi HUA722010CLA330 3.5 inch Hard Disk Drive is a reliable internal hard drive with a storage capacity of 1TB and a rotation speed of 7200RPM. This drive, part of the Ultrastar A7K2000 model, features a cache of 16MB and a transfer rate of 32MB. It supports SATA III, SATA II, and SATA I interfaces, making it compatible with a wide range of systems. With a weight of 1.5lbs, dimensions of 5.79 inches in depth, 4.02 inches in width, and 1.03 inches in height, this Hitachi hard drive is a suitable choice for those in need of ample storage capacity and high-performance capabilities.