thumper

That happens because ImgBurn doesn't support either multi-session or packet writing, thus it burns the whole lot of data and then finalizes the DVD, a method known as Disc-At-Once (DAO). The one you were using probably uses packet writing, so that's why it was shown with free space. Notice that ImgBurn's method produces DVDs that are readable on computers, DVD players, consoles and any devices that reads and "understands" DVDs, while packet writing can be read mostly on computers (may need additional software to work), very few standalone players and consoles, if any. Choosing one method or another depends on what use you'll make of it. Excellent reply, mmalves. Many thanks. thumper

I was using the crap Roxio MYDVD Combo until recently to backup image and data files to a 4.7GB DVD-RW. The files totalled about 700MB. After backup, the disk usage piechart in "My Computer" ("Their Computer"?) showed about 3.5 GB free space. I followed the procedure you kindly gave above to burn backups with IMGBurn. After burning, the disk usage piechart in "My Computer" gives the burnt DVD-RW a capacity of 700Mb and shows it is full. Any suggestions, please? Many thanks. Thumper