the OT seems very fussy about it’s cards.

namaste in this thread had the same issue as you with that card.

http://www.elektron-users.com/index.php?option=com_fireboard&Itemid=28&func=view&id=174391&catid=9&limit=10&limitstart=10

I’m using an ultimate 600x 16G. Works fine although in one of my many batch transfers I had one sample with an error come up. Hasn’t happened again.

i think there’s a list somewhere on the board, either here or elektron users, of proven compatible cards.