You can save as many as you want (up to 56). To save a patch, switch the memory protect OFF (on back). When you want to save something, hold down the WRITE button, then select the bank (1-7) and program (1-8), and let go. That'a all there is to it.
FYI - to get to banks 6 and 7, press the 5 and either the 1 or 2 buttons simultaneously.