 It's actually a simple way to get rid of all your duplicate photos in free of storage space. Open your photos app, go to albums, and scroll down to the duplicates folder under utilities. Each set of duplicates, whether photo or video, should be right there all in one folder. Now, you can either delete them or merge. This will allow you to keep the one with the best quality and trash the rest. And remember, it may take larger libraries longer to find all your duplicates. Your phone does it automatically, so be patient.