To format a USB flash drive from command prompt, follow the below procedure:

    Connect the USB flash drive to your PC.
    Click on Start > Run > Type cmd and click on OK.
    Assuming the letter of the USB flash drive is G.
    Now enter this command.
    format /q /x G: and press Enter.
    Note: Don't forget to replace the letter "G" with your drive letter.


    Thanxx & Regards
     Shivam Bansal