Glen has a ton of images on his iPhone and some are duplicates. How can he get rid of them? Apple says he has to delete them one at a time. If Glen has them backed up to iCloud with the iCloud Photo Library, he can enable "optimize disc space" on his phone. That will replace the full-size versions with smaller versions on the iPhone, while iCloud keeps the full-size versions. But once he deletes them, they get deleted from iCloud as well.