Ideal for use as primary storage in notebooks and external enclosures the travelstar z5k500b delivers the right mix of capacity performance and low power consumption in thin and light mobile applications this 7 mm 25 inch mobile drive supports slim mobile system designs and is also compatible with most standard 95 mm bays with an operational speed of 5400 rpm the z5k500b is a perfect mainstream storage choice for mobile devices external storage and gaming consoles