H Terry,
Thanks for getting back to me.
I had completely forgotten that I had initialized the card in the C100 before transferring it to the 5D. I was suprised it worked too!
Initially I could see the footage in the 5D but now when I put the card back into the camera it says I need to format the card.
Yes, I get the error as soon as I put the card into the reader on my Mac (and also on PC).
I’ll give XF utility a go (thanks for the suggestion). Is there a data recovery company that you’d recommend? I’ve have been recommended so many different ones recently but want to optimise my chances of getting the footage back by using the right one!
Cheers,
Alex