I have an SD card on my Sansa Clip+. I have no problem putting music on the SD card and even playing it via the Files menu, but I cannot figure out how to construct playlist entries for that music. I'm running Linux, so I construct my playlists from there (using Amarok). The problem is that the paths I construct while the Clip is plugged into the computer are not valid when the Clip is unplugged. The SD card shows up as a separate drive, and I don't know how to reference it.