Sorry if this has been answered, I searched but couldn't find any discussion. Does anyone know if turning on iCloud Photo Library on the Apple TV causes it to download your entire library to the device? My data use the day after getting it jumped 8GB in one day, and I haven't watched anything other than DirectvNow, which up to this point has not been using any cellular data on our iPad (I check it daily). I'm on AT&T, ATV4 on 10.1. Thanks for any help.