... FCC ROHS approvalType usb: Metal usb, PVC usb , Wooden usb, Plastic usb, ,Card usb, Pen usb, Jewelry usb, Customized usb , Ceramic usb, each usb with different kinds, different ... USB drive that is undeletable, with the remaining space on the first partition left open like normal for flash drive storage ... flash drive, but also leave any remaining USB storage available as a convenience to the client.3 ...