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I have the latest edition of ubuntu, formated my pc 1 week ago. I Right clicked on the USB flash partition and I sow the format option. It is not grayed out, I do the format, it shows no files when I open the usb file, but when I click on priorities, it shows 94% full.

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marked as duplicate by Warren Hill, Mitch, guntbert, karel, Braiam Nov 22 '13 at 0:36

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1 Answer 1

You will need to unmount the disk before formatting it. You can do this by clicking on the eject icon next to drive in Nautilus:

nautilus eject icon

You can then right-click on the drive to format it. If you still face problems, try using a more advanced partitioning tool like GParted that will tell you why things aren't working as you expect.

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thank you for your prompt answer! –  user217576 Nov 20 '13 at 12:17
    
I will try your second option and see from there, because first one doesn't work for my haunted pc...! –  user217576 Nov 20 '13 at 12:18

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