I bought two ScanDisk Extreme PRO 64gb 160mb/s cards for my 1Dx. However one of the cards are not working, no matter wich slot i put it in i get the error message "No access to card" tried it on my 7D and the same message.
However it works fine on my computer. I am able to access the card and copy files on it.
Anyone have a clue what i can be wrong? i have tried to format the card on my computer but still the same error on the camera