The clue here is the statement "photos were burned to it at various times in the past."
Since multi-session is never a sure thing you must remember how the DVD was created. I see how but not what title of creation/burning software. These can often be proprietary and if they are missing, malfunctioning or expired you can't see the prior sessions.
Try ISOBUSTER as well.
I have a DVD that photos were burned to it at various times in the past. Today i put it in my computer DriveD and the photos don't show. At the bottom it shows 3.96GB used of 4.38GB
the disc hows desktop.ini Configuration settings 1kb and when i click on that i get
is there any way that i can retrive my files?