500GB 2.5" USB powered portable external drive. Blue in photo, but description mentions black. Product code: 655573.
Available for collect at store. Order online to get £60
Note that these apparently contain custom USB hard drives inside, not SATA, so no use for opening for use in notebooks etc. Also appears to lack a power connector port, so you might need a Y-usb cable if your usb ports do not provide sufficient power to power off just one. These newer Passport drives are supposed to offer better spin-down/sleep functions and backup functions over basic external drives.
Further details about this drive here:http://www.wdc.com/en/products/products.asp?driveid=700