I recently purchased an Extreme Sandisk 64G (45mb/s) card for my Canon T3i. I did some video with it. Then I tried to download the video onto my laptop. When I inserted the card, a prompt said that I had to format it. Luckily, it was just test video so that was not a problem.
I put the card back in the camera and formatted it, shot some more video and tried to download again. Again, the prompt said that it had to be formatted.
I went to (http://kb.sandisk.com/app/answers/detail/a_id/4396/~/formatting-a-64gb-flash-drive%2Fremovable-disk-on-windows-xp) and followed the instructions there formatting the card to ex_FAT.
Now, when I insert it into my pc, the card reads as only being 1G.
Is there any way to correct this and have it format as 64G.?