If you are using windows you can click on your start menu and then click accessors and then run now type diskmgm.msc into the run box now it will bring up all of your hard drives including your imaion nano just make sure its plugged in before you type diskmgm.msc into run. Now right click on it and it should allow you to extend the drive and that should putt the 6gb back on to it. If that wont work then go to this website and get help from there.www.ehow.com
