Give users the CHOICE to not sync at all. Not just turn off sync over cellular data. Once my photos are synced, they are also locked away on the cloud and I can't edit them until I have service again. On my long hikes I am often without WiFi or cell service for days on end so I am cut off from my photos. I do not care that I don't have access to face recognition or search features. I accept the risk that the photos aren't backed up. GIVE ME THE CHOICE! Give me the ability to access and edit my photos when offline.