After trying for hours and reading tons of forums, using multiple computers, and multiple sd cards. I still could not get in all my sd cards where sandisk. I read several times that people had luck with a 2GB PNY from walmart. So I went to walmart bought that same card and it worked 1st time right away. So I would say that the majority of people having issues should try that 2gb card from walmart as your FIRST troubleshooting issue because everything else for me was a gigantic waste of time.