Toshiba HDD2H21 500 GB 5400 RPM 2.5-Inch 8 MB Cache SATA Internal Hard Drive Toshiba MK5055GSX 500 GB SATA/300 2.5-inch Hard Drive General Features: 500 GB storage capacity SATA/300 interface 5400 RPM spindle speed 8 MB buffer Number of data heads: 4 Number of disks: 2 Average latency: 5.55 ms Transfer rate to host: 3.0 Gb/s 2.5-inch form factor 9.5 mm drive height Applications: Mobile PCs Game consoles Printers External storage Power Specifications: +5V, 1.0A 2-YEAR DIRECT WARRANTY