I am using Curtis LT7029 Android tablet. When I change sd card, I transferred the same folders and song titles to a larger caapcity sd card, the playlist titles are still there but when I click the playlist to play the songs, it was blank inside. Seems like the titles are saved in internal memory but the order of the songs are not there when I click on playlist. How to backup the mp3 playlists when changing sd card ? Thanks.