Appols if this is well known.... I have been agonising how to succesfully back up my growing mp3 collection from my pc. The tracks are arranged in a complete nest of subfolders of different sizes. By chance i discovered that my copy of Nero 6 has a backup tool and it works a treat!! - point it at the folder / subfolders you want and tell it you want to use the DVD drive. It does all the working out about which folders to put on which disc, so that they are efficiently filled up and then calculates how many DVD's you need and simply propmts you to insert blank discs when needed - brilliant.. I used a new pack of DVD+RW and it even formats each disc before burning and has an option to verify the data on each disc after burning.