I have bought rewritable discs for my Handycam. I made a 30 min movie. Then I finalized my movie, then from the disc I put the movie onto my computer for editing. I then put the rewritable disc back into my Handycam, unfinalized the disc, ready to shoot another movie. I noticed the last movie was still on the disc, the problem is that I can't find an option to delete the last movie on my Handycam, does anyone know how to do this?