Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

This question already has an answer here:

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.

share|improve this question

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

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

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.

share|improve this answer
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

Not the answer you're looking for? Browse other questions tagged or ask your own question.