But I want to remind the light of certain comments that the 32GB is the real value of the memory. Now for the exploited, it is necessary to format, which uses about 9% of the total storage capacity (and that goes for all hard disks, USB keys, portable ...). Therefore, we do agree that you can only use 29 GB on 32, just missing the 3 GB for you to use the other 29, to make it simple.
If you hesitate, know that it's not worth it, excellent wine.
PS: the version number 1 in sales is a class 6. 2 less, you will lose a lot in speed. Better to get this card one, 10 class for 2 more (20).