I am using an SD card for mp3 music. (512 GB - the max is 2000 GB)
Not all the Genres on the disk are showing. I have used mp3tag to make sure the genre tags conform to the ID standard. (Had to use strange tags to show different genres I want to separate.

Does the Kenwood Music Editor work for this unit?
Is there a good app to sort our the mp3 files and find our why some tags are not showing?

 

To answer my own question, although surprised this forum could not assist:
I discovered by trial and error that there is a limit to the number of files per device.
this explains why the unit comes with 2 USB connections and 1 SD card socket. I am now using all of these to access all my mp3's.

I could not see the need for the 3 connectors.
However it does not explain why the SD card can go up to 2000 GB, which for mp3;s is too much for the allowed number of files, but it would allow for videos.

The lack of infomation on this subject is a disgrace. Kenwood have not replied to a support question. Why provide systems without explaining how to use it?