I installed Ubuntu 12.04 along with a few other Linux distros to a 64GB usb drive with a Windows program called "YUMI". I love Ubuntu and it's my favorite. The only problem I'm having is that when I download something I can't save it to the USB drive.

I mounted the USB drive and was able to create files from the terminal by using the sudo command. However I was still unable to save files to it using the GUI.

Can anyone please advise me? I was trying for ages using the chmod command and still got nowhere. I'm thinking now that it just may not be possible. I thank you for any help guys!