Did anyone ever get to the bottom of why you can add several audio files to an SD Card through SD Jukebox by 'convert' and 'check-out' and they work perfectly - then do the same thing a few days later with the same SD Card and suddenly none of the audio files will show up on the KN7000; and I'm not talking about such large numbers of audio files that the SD Card runs out of memory...and they are there on the SD Card cos you can see them and play them through SD Jukebox...grrrr...or am I the only person in the world using this facility on the KN7000?