HI,my usb memory sticks work fine on the front &back of the 800,also i use a usb hardrive & a floppy sometimes the both work great , have not tried loading any sample stuff yet , as i am not ready for it yet, right now i am trying to figure out how to run the 800 from the pro, using it to control the 800, i think the make a nice duo in my opinion, best regards , BENNO