The bag fits very precisely, so that the hard drive, even if it is alone in his pocket, has no game. In addition, de pocket of relatively thick flexible material, which could absorb a possible fall a little. If you are using a cable (20-30cm) with packs in the bag is relatively narrow, but there is a mesh pocket for cables, it does not rub on the hard drive. The only drawback is the narrow opening, when you do not have to scrape along the zip a bit careful. All in all, a great bag!