How to I start the c240 up it My computer doesnt
On Windows XP, when you open My Computer, the Sansa C240 shows up at the bottom, under "Other". Because of DRM restrictions, you cannot copy media files to the C240 using Windows Explorer. You have to use Windows Media Player to sync playlists to the C240 (WinAmp can do it also).
I also suggest that you check out RockBox. It's an alternative operating system for portable media players and they have a version for the Sansa C240. It will give you some additional functionality.
As far as I can tell, to copy files to the microSD card (if you're using one) you have to use a media card reader, then insert the card into the C240.