A while ago, I thought my sdcard went tango uniform. I later saw this post: I eventually got around to using the software, and everything appears to be working just fine. Filled right up with music from songbird. If you are having format problems, you may want to give this a shot. On a side note...the speed difference between the stock and my 4g pny class for is rather noticeable...I think I'll be buying a 8g class 4 in the near future.