I've got an AT&T iPhone 6. When I plug it in to my Windows PC I can see the phone under portable devices. When I open up Internal Storage, about 50 photos show up in the folder inside. The problem is, I have over 1500 photos on my iPhone. I'm trying to back them up so I can clear them off the phone and free up space. Any ideas why they all won't show up? I can see them on the phone just fine.