For drives that cannot be written to:

Usbutil V2.00 requires a specific driver to access low-level hardware. Usbutil V2.00 Full English Version Free Download

  • Run Usbutil.exe as Administrator (Right-click → Run as Administrator).
  • If prompted to install a new hardware driver, point Windows to the Driver folder included in the download.

    • Standard formatting deletes data at the file system level (FAT32/NTFS). Low-level formatting resets every single memory cell on the NAND flash chip. This can remove boot-sector viruses and fix "Access Denied" errors. For drives that cannot be written to: