I keep getting the message that the storage on my iphone 6 is full. When I look under 'storage' in settings, it says Used 12GB, Available Zero KB. The app that shows most used is 'Photos & Camera' at 2.8GB used, but my photos are supposed to be going to icloud. I don't understand why the photos are taking up so much room. Can anyone help me? At this point I can't take anymore pics.