My A900 is having difficult time keeping up with a 64Gb CF card. Granted it was an used card and worked flawlessly for about 3-4 months, the combo has become unreliable. All of a sudden, Camera freezes saying it cannot read the card. Only options I found to work at that point: 1) Replace the card 2) Remove the card, load the images to computer, format the card, put it back in the camera and say ok to formating the card in camera.
I tried removing battery and putting it back in and it did not work. There is no discernable pattern for me to avoid. I am suspecting it may have to do with the card, since other cards (16Gb, 8Gb, 4Gb) do not have this issue.
Any insight? Any suggestions for me to try (other than get a new camera

). Thank you in advance for your help.
Sury