Driver Nand Usb2disk Usb Device -

or sometimes:

If your USB drive contains irreplaceable files and continues to show the "Nand Usb2disk Usb Device" error, . Driver Nand Usb2disk Usb Device

Use ChipGenius to identify the chip and rewrite firmware using an MPTool. or sometimes: If your USB drive contains irreplaceable

If it shows a partition but has no letter, right-click the block and select . right-click the block and select .