Seeing “USB Mass Storage Device” and a full “USB2Disk” is frustrating, but it’s rarely a sign of total death. In many cases, it’s a controller lock triggered by corruption or bad blocks—and a low-level format or firmware reflash can bring it back to life.
The USB controller failed to communicate with the NAND memory chip, showing as a generic device with no usable space. usb mass storage devicenand usb2disk full
If the drive says "Full" but looks empty, go to File Explorer > View > Hidden Items or run the command attrib -h -r -s /s /d X:\*.* (replace X with your drive letter). Seeing “USB Mass Storage Device” and a full