Is there a way to save game saves to a usb stick??

I want to take my street fighter 4 up to college where I can play on my buddy's ps3, and I dont wanna go through all of the trouble of unlocking all the characters again..

I tried to save my SF4 game save to a usb stick but it says that I cant..is there any other way around this?

U can Copy saves on to a USBJakesta7