Why has my data usage tripled since system update on Samsung Note 4. I've gotten several texts saying I'm over. We never go over our 2GB as we have WIFI at home and work. Google photos setting is to back up on WIFI only and it used close to 3GB! What is going on and how do i prevent future "background" overages? I restricted them in the app. It is absolutely ridiculous that I'm suddenly hit with overages that weren't caused by my actual usage (meaning that I was physically doing something that used data!)