Ultra Slim - Only 11.5 mm Scratch Resistant Design LED Indicator to show transfer status USB 3.1 and backward compatible with USB 2.0 devices 3 Year Warranty HV620S packs up to 2TB of external storage in a drive that? s only 11.5 mm thick. The design also shines with a mirror-like gloss, simple but elegant and fitting for dependable, go-anywhere storage that runs via fast USB 3.1. For all your content and with nearly universal device compatibility, the HV620S embodies smart design that increases capacity and performance while reducing physical space requirements.