Thanks Todd
That’s very helpful but I can’t see a ‘repair clip’ option. And although I can copy and paste ‘good’ clips to the other card, i can’t do it with the bad ones. One difference when looking at their data info in camera when trying to copy is it says the bad clips read 2.1TB in size and that comes up in red, whereas the good clips say their true size in white.
This morning I transferred some of the bad clips on to my computer and then they suddenly stopped appearing on the screen. However, they’re all still on the card in camera but with these question marks. I feel that they’re still lurking there so it’s frustrating.