Travelstar 5k1000 is a 5400 rpm 500gbplatter 25 inch hard drive available in 640gb 750gb and 1tb models this standard 95mm two disk design intended for use in notebook pcs external storage gaming consoles and other mobile applications leverages advanced format which increases the physical sector size on hard drives from 512 bytes to 4096 4k bytes to increase drive capacities and improve error correction capabilities consult the hgst advanced format technology brief for more information on usin