I'm trying to back up my Pokemon Black savefile, but it seems that I can't. The progress bar would not move on, and I'm stuck at this screen for about 20 minutes (and it's still on going). I installed the driver properly (disabling the unassigned driver stuff) and the usb does get detected. Is this a defective unit? Or is there a way to solve this? I've tried reinstalling the drivers, but to no avail.