On my new-to-me 1dMkIII I'd like to have only one folder on my camera, the previous owner has several for some reason. What's the easiest way to erase all but one (or start over with just one) and also have the images named something like my 50D did (IMG_1234.JPG) instead of what it's being named now (_C9Z0032.JPG)
Is this possible ?
Thanks !

