The MK2555GSX 2.5-inch hard disk drive series offers up to one half-terabyte in capacity with quiet acoustics and enhanced durability, providing a solid storage solution for high-capacity mobile PCs, game consoles, printers and external storage. Advanced servo techniques combined with mechanical design changes minimize noise emanating from the MKxx55GSX drives, making them nearly inaudible during operation.
Further design optimizations have boosted the durability of the MK2555GSX series to provide industry-leading robustness against operating shock. An optional free-fall sensor (FFS) feature further protects user data against potentially hazardous external shock and vibration events.
Cheapest 250GB 2.5" drive about. I know about the 640GB drive for £45 but not everyone needs that size of drive