Step recording Chords

[Ajag]

Hi every one. This is my first post.
I find that when I step record Chords on my Psr S970 I can only use on board styles. I want a style I have on my USB stick. And I'm unable to select from the USB I also made a copy to the User ex spansion and still can not select it.
Can any one advise me if this can or not be done.

Regards and many thanks
Ajag