I am struggling to figure out the difference between camera roll and photo stream. All I want is one copy of each photo I take left on my camera and then at the end of the day I want to download them to my PC. When I download them they stay on the camera even though I select Move. I found out I have to go in and delete them from the camera one at a time. Why can't I just move them out of the camera like I have done on every other camera I have used?