I have a iPad 3, never jailbroken, with iOS 8.4.1. (I don't plan on going to 9.x, but that's for another topic.) I connect by USB cable to iTunes 22.214.171.124 on Win8.1Pro/64. I suddenly started getting the rather unhelpful error iTunes could not back up the iPad "Hotaru iPad" because an error occurred. This gives me no idea where to look or what to do. Is there any way to get my backup functionality back?