I  don't know and  cannot help there, Meowgli. However, I have not gone over 2 gig on my cards finding that quite acceptable.   I carry more than one card along.     I  don't plan on using the card as the permanent storage place for images and as you mentioned, don't want to loose images should the card go bad for some reason.

8 gig?  I would be overwhelmed with trying to edit images from a card that large.

Stil, Richard, if that is a good reliable card it looks like you scored the bargain. : )