I have a GoPro 7 White that I charged up and took a short 10 second video yesterday to try it out. Worked fine. This morning, I tried several videos at differing lengths and they get filed as unreadable files. When I open the directory on the PC, the icons show pictures in them, but the screen on the device says unreadable file. when I use GoPro Player, it also tells me that they are unreadable. While recording all seems to be well. The screen is lit and the light is blinking. Any thoughts?