Purchased May 21, 2015 to increase storage on my old Xbox 360 Arcade. . Remember that Microsoft's system files reserve a significant amount of disk space for work. While physical storage is actually 120GB as advertised, it's not "available" for storage and gaming. This is true for 20GB, 120GB or 1TB hard drives, even on a PC, so don't read these reviews and assume the drives have some sort of bad sector as they just don't true is. To retrieve information from the original drive, simply insert a