Hello,
I'm not entirely sure HOW exactly but mostly with roland synths you press the UTILITY button, then search for BULK DUMP, ofcourse when you do that you need to readyfy your software wich is going to receive the dump.. Anyway there shoul also be an option for receive and transmit these data, I even thought you could make a difference between dumping/receiving patches or performance or whole system.
Again I'm not sure because I never really do this kind of stuff
CD