............But you don't say how you transferred the songs to your SD Card.....

As I said above, if you just copied them from your PC to the SD Card, that won't work - even if you can see the files on the card, when using your PC to view them.
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Willum

After silence, that which comes nearest to expressing the inexpressible is Music.
Aldous Huxley
( especially when the music is played on a KN7000....)