I bought a sandisk 2 Gb card for my 510 because of the new NA maps. I tried installing and half the time it will show an animated request to remove the card and other times it will show the TomTom splash screen, run the yellow line like it's loading and then power off. I also tried restoring everything from the OEM card backup to the 2GB with no luck. The card is good because I was able to copy and access everything from the OEM card to the 2gb. I tried that in the TT and it didn't work. Is there something that I am missing. Thanks.