I have a 8gb usb and i used it for a long time and i had a lot of documents in it. Yesterday i noticed i had only 1 gb left on it, 7 already used. I backed up all my documents and deleted all of the stuff from there. COMPLETELY EMPTY. I plugged the usb into the computer but it says ONLY 2 gb available. How is that possible? I completely emptied the flash drive. Please help me, i need to save a huge project right now, it's 3 gb but I don't have enough space to do so. How is it possible that only 2 gb are available?