Hi, I have a problem. Today I was copying video files from the SD card and I noticed that some of them can not be read. From 30/03 to 8/04 they are good, and then suddenly until 18/04 all are damaged. Message from computer: QuickTime Player can not open "2019_0418_171036_105F.MP4". The file has a name, the right size but I can not open it. I have SanDisk Ultra 128GB card. Any ideas?