iPhone back up and restore partially
Hi all,
I currently have 2 phones, iPhone 5s 16GB (iOS 8.4.1) and iPhone 6 64 GB (iOS 8.1). Now I want to migrate the data from the 5s to 6. It would sound easy, but the problem is, when I was using both phone, I have different pictures on each phone, and I have about 3000+ pictures on the iPhone 6 already. If I simple do back up 5s and restore to 6, I'm afraid I'd lose the pictures on the 6. I could back up the pictures from the 6 first, but, is there an easy way to just restore without overwriting the pictures already on the 6, or I can re-download all the pictures previously on the 6 after the restore without too much manual work?
Thanks!
iPhone 6, Windows 8, iOS 8.1