How do I format a 16gb flash drive. The properties said it is full but there are no bytes shown

[daford1935]

I have a HP 16gb Flash Drive. In properties it is shown as full but no bytes. I try and format but windows state it cannot format

 

[Dereck47]

Use the Diskpart "Clean" or "Clean All" command and see if that works: http://www.sevenforums.com/tutorials/52129-disk-clean-clean-all-diskpart-command.html