1. 11.4
2.
http://3ds-flashcard.com/home/23-wood-r4i-gold-3ds.html ( if in the US, choose USPS shipping, come from china of you don't)
3. not yet, dont see it be any different from my 64gb sdxc, just use guiformat to format it to fat32 32kb
4. buttons are fine, magnet did not hurt anything
5. mine came with a charger which was a surprise cause everyone said it didn't
6. used 2 devices, already had an sd card set up for my O3DS for when the flashcard got here
7. turquoise and black, only one available to me in the US