Thanks for the link. I followed it to the article and then another link there to the sandisk site which lists compatible devices. However they don't have a samsung focus in their list any longer.
I'll see what I can find with other brands.
A couple of years ago, there was a professional camera website that did intensive testing on a lot of flash memory. There were a lot of flash memory sticks that didn't even come close to matching specifications for read and write times. I remember that SanDisk and Lexar were rated the highest. As I recall, I think they rated Lexar over SanDisk. I had never heard of Lexar before. Other memory sticks that were rated high were, Kingston, Corsair and Adata.