How to set the default memory (internal or SD Card) used in Nikon P510

I have searched the PDF extensively and I cannot find in the manual where it says how to set the default memory used by the camera. Frankly, I would be happy if the camera had no internal memory of its own as I prefer to always use a removable card; but, where in the manual is that stated?

I'm not sure what you mean by "set the default memory". The P510 has 90 mb of internal memory, which is used only if you don't have a memory card installed. This is noted on page 23 of the manual under the heading "Internal Memory and Memory Cards".