USB Pendrive   YUMI YUMI exFAT - a Multiboot USB bootable software. Easily copy multiple ISO images to a bootable USB flash drive and select which ISO to load at boot How to Restore USB flash drive using diskpart in Windows Source Open a command Prompt as administrator ( cmd.exe ) Type  diskpart Next type  list disk Type  Select   Disk X  (where  X  is the disk number of your drive). Type  clean  *  If Error, See Note Below Next type  create partition primary Type  Format fs=exfat quick Note : (for 32GB and smaller drives, use fs= fat32 ) instead. Then type  active Next type  assign Finally, type  exit to quit