I have something strange going on with my 8130. I have a 6 gig card in it and I've added several songs to the music folder on the media card via desktop manager. They are all mp3 and are not drm protected. They all seemed to copy onto the card just fine and show when I browse to the device memory card via windows explorer.
The problem is I copied 18 albums of music but only 6 show up in the music player. Again All 18 albums and there song show up on the memory card in both windows explorer and desktop manager. I treid formatting the card and reinstalling all the music agin but it made no difference. Why the bb player isn't seeing them I have no idea.