I'm trying out an application which backs up my iPhone -- CopyTrans Shelbee. I'm testing that application because I've been using iTunes to back up my iOS devices, and I understand that may not be possible for much longer. CopyTrans takes forever, during a backup, persisting at the phase called "Camera Roll", and the size of the backup is several GB. This is a mystery, because I have no photos, favorites or albums stored on my iPhone, no videos, and no recently deleted photos. If I perform a full backup with iTunes, it takes only a minute or two, and the size of the backup is 250 MB. It is possible that some ancient photos or videos were stored in iCloud, but I don't know how to access them. In the iPhone Photos settings, iCloud Photos is turned off. Any suggestions on how to clear up space in "Camera Roll" would be appreciated.