what the hell are these files?

I had some old corrupted files on this Micro SD with 16GB of space,I already knew by the photos,but by seeing the properties of some files,one folder had 78GB of space...how was that even possible?so I started digging and found that these are the source of it.what are they?why do they appear?why are all the dates so cursed and why are they detected with so much space?if I try to open one,it tell me that it doesn't exist,but without deleting it