- What exactly are you trying to do? What exactly is "locked", I mean: what error message do you get when you do it?
A burned DVD is read-only. To change the content, you copy all files to your PC, do whatever you like to do, and reburn the final result to a DVD again. Note that burned DVD's don't have eternal life, so be sure you have 2 backups and refresh these each 5 years.
I had a company scan photos of my mother in laws photos and when I received the DVD back, I had planned on renaming photos with names, dates, etc only to find that the DVD and the images (jpegs) are locked. Is there anyway to unlock those so that I can rename them, They are my photos and I am not happy that I cannot edit them.