So I am trying to add folders to my DVD-R (note this is my only one left) and I get files on it using ImgBurn. Now I can't format OR delete those files...? I am trying to add an ISO to it (not a Wii ISO) and it won't let me do anything. It's telling my Disc Not Empty. I figured this would be an appropriate place to put this considering back-ups use DVD-R... How do I format it?