Hi. I've been burning DVD-Rs using DVDShrink and Nero. I started off on five DVDs from Memorex and those worked great. However I recently bought a spindle of 25 and the process seems similar, but after they are burned it appears that nothing has been added to the disc. I checked the disc properties and noticed that the file system on the spindle is RAW, whereas the Memorex discs (and any other DVD movie I checked) has a UDF file system. Is this causing the problem? If so, how do I change it. I haven't made any changes to the preferences under Nero Burning Rom - New DVD-Video.