Formatting an USB flash drive from the command prompt is a simple process that can be achieved using the format command, which works for most version of Microsoft Windows (Windows 95 up to Windows 8.1).
How To Format a USB Key from the Command Prompt
Connect the USB flash drive to your PC. Then click on Start > Run. Type
cmd
and click on OK.
Your USB flash drive will be assigned a letter. For the purposes of this example, we have provided a command using the letter G but note that you should replace this letter with that which is assigned to your key.
Type the following command, followed by Enter:
format /q /x G:
Note: The q parameter stands for "quick format" and the x parameter will force the selected volume to dismount if needed.
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