HI,
I just tried to compile the lightsaber source code as exemple.
I got an message error:" “…\sd.h” not found"
I fix this issue by replace the line #include “…\sd.h” by #include “…/sd.h” in the diskio.cpp file
I’m on arnuino IDE 1.8.3 and on Mac OSX Sierra 10.12.5
regards