Hi there!
Want to see another way of using the SD card and how the KN-7000 can adapt to many kinds of applications?
First let me tell you that I personaly use extensively the 16 tracks sequencer on board rather than the autocords. I love to fool around arranging and recording each single tracks on a song. You see, I'm basically a composer and arranger but I also play in a musical Duo gigging out at times playing Classical Rock and Pop Music. So using the sequencer is a must for me and my female musical partner.
What I do is make all the arrangements and settings on one single MIDI song and then press the panel write button in the Sequencer menu to record the settings, then save it INDIVIDUALLY to the SD card by navigating to the 3rd saving screen on the SD Save menu. I have over 70 original MIDI songs recorded this way ready for playing live.
And to go faster while playing live I also use the sequencer play option(10 songs)...Let's say that I name one particular sequencer file "Set #1". Then I load every single MIDI song using the 3rd load screen on the SD Load menu filling up the 10 spaces then I save it back using this time the 2nd saving screen on the SD Save menu...but you have to unselect(no) every tag except the sequencer one(yes). This way, when you load back onto the machine this "Set #1", you're only loading the sequencer with all the 10 MIDI songs (or less) with their original settings.
Let me tell you this is pretty fast and useful while playing live. With only 2 single loads, you have over 1 hour of music. All you have to do is navigate through the sequencer play menu from song 1 to 10.
I'd like also to talk about a great feature that I use which I think the Tyros 3 does not have(Ha Ha, I see interesting discussions coming up!)...

The SD Audio Synchro feature.

Up to now, I did not see anybody talk about this feature but this thing is pretty useful to me and my partner while singing songs that need more than 2 voices live.
How do I work around with that special feature?...What I do is put my MIDI file on a my computer with a program like Cubase or Sonar and then record live the needed extra voices with my partner, saving'em back to a mp3 format file and shooting it back through the Panasonic USB reader onto the SDcard.
Now what I have to do is load the original MIDI file, go to SD Audio Synchro, and choose the playlist number(mp3 file on the Sd), saving it all back to the SD Card....
And you're asking me...what is that "Tempo Adjust" thing for?... This is because 2 differents computers can have 2 differents clock timings. In this case, the Kn-7000 and my computer(those guys at Panasonic we're simply genius!), so you can have a gap building up while playing the MIDI file song and the mp3 (which is a wave) together. The Tempo Adjust will correct this.
...It took me a while going through and understanding this whole thing by myself. The instruction manual is not very clear about it. So I'm very happy to share my own experiences(if it may help) with other KN-7000 owners.

Cheers,

Serge