Hey Mark, On my Rolands I can save the Performances [G1000 on Zip]..They are small data and reload quickly..I think you can save the factory Performances in your flash memory as well as external media sources..After you save the factory performances, you can modify the data to suit your needs [and save your new Performances]..It is very easy to recall a Performance group..and I am pretty sure you can reload a single performance at any time[as the Music Assistant functions]..
Maybe Diki, Don, Hank or another G70 user will enlighten you..