Hello Khai,
I must take issue with you, with regard to your comments above
Since the Technics keyboards appear to a computer like an External disc drive, it would not be possible to connect any other kind of disc drive to the USB port. It would be like connecting one disc drive directly to another and expecting them to be able to transfer data between themselves.

Whilst external USB Floppy disc drives do exist, I cannot understand how you can compare the performance and capacity of such a device, with that of an SD card!

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Willum
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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....)