I got my Toshiba M105-S322 as a refurb and tried to use the DVD "Super Multi Drive" (all formats) to burn a DVD for the first time yesterday. I used ImgBurn to burn an ISO file that I downloaded (GParted) to a new DVD+RW disk. The burn went fine, I can see the files on the disk in an Explorer window. However, when I look at the drive properties it shows 52MB of used space and 0 bytes of free space. What happened to the unused 4.6GB, more or less, that are on the DVD+RW disk?