I have a 1 GB Sandisk that I bought from Dell, and after tranferring a bunch of MP3's to it, it reach about half full, and then told me it was full! I've only transferred 450 MB onto it, yet it's telling me I can't put anything else on it! Any ideas, anyone? It seems to me I remember reading something about reformatting the CF card...does this ring a bell, and how do I do that to get full use out of this monster?