Maybe an experienced SanDisk owner of an older Clip model and a Clip Jam / Sport can tell us if the music and audiobook library files created by one player on a micro SD card can be immediately used by the other player.
I am guessing the library files will not be functional in a different generation of a SanDisk device.
(Even though the audio files could be totally compatible; if no DRM.)
Also, I did not know that the Clip Sport could format the micro SD card (only the internal memory of the player)?