Has anyone had to replace their navigation SD card? Just wondering what it would cost. Also, since it would be easily stolen if someone breaks into your car, is it possible to make a back up copy? I've never removed mine from the car so have no idea what type of files you see on it if it was plugged into a computer. If Ford only charges $50 or something for a new one it's not a problem but if they charge $500 it would be nice if you could make your own back up, I'd leave that in the car and keep the original at home. This is the first vehicle I've had where the navigation system wasn't hard drive or DVD based. Not a big deal but it would have been nice if they put the navigation SD card somewhere not so obvious.