What is your USB drive giving? (e.g., "Write Protected") Are you trying to recover data or just fix the drive ? What is the brand and size of the USB? USB Drive Low-Level Format - BureauSoft
: Click the format button. The process is slower than a standard format because it writes to every single sector.
A corrupted partition table or counterfeit flash drive will report incorrect capacity. A low-level format resets the drive to its native, factory-reported size.