https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Got-a-64g-extreme-pro-in-a-t4i-is-it-ok-to-use-fat32-format/m-p/20221#M7047 Exfat won't work in ipad, reformatted fat32 works fine in sd reader on ipad3 ,64gb extreme pro . Wed, 10 Apr 2013 22:48:53 GMT rhughes88 2013-04-10T22:48:53Z https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Got-a-64g-extreme-pro-in-a-t4i-is-it-ok-to-use-fat32-format/m-p/20221#M7047 Exfat won't work in ipad, reformatted fat32 works fine in sd reader on ipad3 ,64gb extreme pro . Wed, 10 Apr 2013 22:48:53 GMT https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Got-a-64g-extreme-pro-in-a-t4i-is-it-ok-to-use-fat32-format/m-p/20221#M7047 rhughes88 2013-04-10T22:48:53Z https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Got-a-64g-extreme-pro-in-a-t4i-is-it-ok-to-use-fat32-format/m-p/20439#M7048 You should format your card in camera. The camera will automatically format it as FAT for card that is less than 128Gb. Fri, 12 Apr 2013 19:39:44 GMT https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Got-a-64g-extreme-pro-in-a-t4i-is-it-ok-to-use-fat32-format/m-p/20439#M7048 hsbn 2013-04-12T19:39:44Z