Video instruction (we use GoPro11 in this video)
Sometimes memory cards can save files with errors.
But this is easily corrected by a full reset.
In different GoPro models it's all plus-minus the same.
GoPro 10, 11:
Swipe down-swipe right-preferences- reset - Format SD card
GoPro 7, 8:
Swipe down -preferences- reset - Format SD card