Hello:
You are saying : "I am told that Panasonic will provide a USB SD memory card reader/writer so that you can quickly copy files from your PC to the SD card and then load into the Technics KN7000.3

Untill now you can not copy files from the pc to the card reader.
You can transfer a file from the pc to the kn7000 with the program songmanager and only one at a tim.

I hope they are working on a program to copy multiple files or even directories from the Pc to the Sd card in the cardreader or to the Sd card in the Kn7000.

Alain