I have a 4gb Transend card I just purchased about a month ago. It seems to do well, but one thing I notice is if I try deleting a file on the BP, it messes up. I seem to have to pop the batteries to get it right. So, this cycle, I am not going to delete until I go through the transfer software or put the card in a card reader. Maybe that will make a difference. Maybe it is Transend or maybe it is just my BP.