Is this 64 GB SD card compatible with my 1D Mark IV ?
I purchased this 64 GB SD card to use in my Canon S100 and I have no problems with it but when I try to use it in my 1D Mark IV body the camera will not record to it and I get the following message. I do have the latest 1D Mark IV firmware update
If I try to format the card in the 1D Mark I get the following message:
The card works perfectly in my S100 and Rebel cameras. Is there something wrong with this card or are 64GB SD cards not compatible with the 1D Mark IV body?
I have never had any problems before reading both CF and SD cards in my !D Mark IV but I have never used such a big card. I am considering buying a 64GB CF card but now I am not sure it will work in my 1D Mark IV body
Thanks in advance for any help or suggestions 




