I used gnome-disks to burn the ISO of Ubuntu MATE 16.04.1 to my USB and now I would like to format the USB. But I think I bricked the USB 
Mine is a 32GB Lexar USB but it's coming up as 117.00GB
BTW I had a lot of trouble installing Ubuntu MATE 16.04.1 the installation would finish but I could not boot grub. When I tried "Something Else" I had “Reboot and select proper Boot Device" errors when the installation finished. I had to install Ubuntu MATE 16.04.1 again and then I chose to erase the hard drive and install Ubuntu MATE 16.04.1 and then it worked.
I recommend downloading and installing Mintstick. Gnome disks tends to bork my USBs as well. Mintstick will just nuke over the top of any damage done to the USB and will fix it.
http://packages.linuxmint.com/pool/main/m/mintstick/mintstick_1.2.8_all.deb
Minstick does only 2 things. But it does them perfectly in my opinion. It format USBs and it writes ISOs to them
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Thank You 
Your a life saver Windows could not recognise the USB either
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BTW I had a lot of trouble installing Ubuntu MATE 16.04.1 the installation would finish but I could not boot grub. When I tried "Something Else" I had “Reboot and select proper Boot Device" errors when the installation finished. I had to install Ubuntu MATE 16.04.1 again and then I chose to erase the hard drive and install Ubuntu MATE 16.04.1 and then it worked.
The problem with installing Ubuntu MATE 16.04.1 still is an issue. I eventually solved it.
Where you select to install updates and codecs aka ("Preparing to install Ubuntu MATE 16.04.1") the installer would hang. I found what was taking so long, it was downloading something. I could see the data symbol flashing on my phone so thats how I knew.
