In my previous thread, we affirmed that photos in albums beneath the Camera Roll are really in the Camera Roll and only pointed to in the other folders. Thus, deleting the photos in the Camera Roll necessarily deletes the same photos in the other folders. There are third-party apps that act differently. Upon reflection, I'd like to state my question differently and more accurately. Let's say you have 1,000 photos in your Camera Roll and 250 of those photos have been designated as Favorites and are in your Favorites Folder. You've got all your photos backed up elsewhere. You'd like to purge your phone of all stored photos except for the 250 in your Favorites Folder. What is the easiest way to do this?