Word up. I've been filling up and then trimming down my Sansa mp3 player, still haven't maxed out the 8gb with rockin tunes, but sooner or later I will have to pick up a Micro SD chip for it. That said, my first experience with Micro SD was for my DS loader, and I swear, I sat there looking at it for about 20 minutes, in awe. 2 gigs on something a quarter the size of a penny, half as thick? The fact that so many people in this thread are nitpicking is just further proof that the future is now. As far as I am concerned, the USB Flash drive is what the Floppy disk always aspired to be. The unfortunate downside to Micro SD is that it is simply TOO small. Too easy to lose/Break. First HD? 20 mb, and I don't even want to talk about how much it cost. At the time however, it was glorious.