I have to say I'm a bit confused about why it's not successful or possible to copy files from one SD card to another by use of the PC.
As long as the SD card is correctly formatted at the KN, and the folderstructure is there, then to copy/paste or drag files between the two should be easy as that, or as some say, 'a piece of cake'.

Great to see you got your issues sorted out Howard. smile
Wonder if I should look for a KN2600 to make all my KN stuff playable and back to life again.... confused
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Cheers 🥂
GJ
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"Success is not counted by how high you have climbed
but by how many you brought with you." (Wil Rose)