Whilst I do not like using re-writeable discs - I have tried various makes, used various DVD burners and various computers. Re-writeable discs seem OK on first use and then rapidly deteriorate.
You might like to adopt the following workflow which may solve your problem.
1. Get hold of one or two re-writeable discs. Also get hold of some DVD -R discs.
2. Create your DVD Project with VideoStudio and make sure you save it as a project file. Do NOT remove from your computer any of the material you have used - videos, images, music etc.
3. Burn your DVD onto a re-writeable disc (This is a temporary disc).
4. When you have more material to add, open your original VideoStudio Project file. Now add your fresh material.
5. Erase the re-writable DVD disc and burn a new copy containing your new material.
Continue to do this until your disc has reached its capacity and you cannot add more material. Now it is time to burn the project to a DVD -R disc.
You can then once again erase the re-writeable disc and use it for your next project.
