I'd be weary, the pic shows it as an "HC" card. Also, its a lot more expensive than the card from the cheapass site which we know works.
That's intersting regarding the external HD, though I thought N said that wouldn't be the solution. We need something that for sure, and we needed it yesterday. I keep having to switch cards when I switch RB2 & GH:WT discs and that got old a long time ago.