years ago bought this DVD Series and now backing it up with Makemkv.
Just found out that the DVD are flippable;
two DVD could backup also the flipside;
the 3rd DVD has also flipside , but there is DATA on it;
on the DVD itself is written
NO PROGRAMMING FLIP SIDE
there are 4 files a ca. 800 MB on it;
Could someone help please solve the mystery of Disc3-Flipside?