Saving data to onboard micro-sd

Hi, I am new in Galileo gen2

I try to read the sensor data from analog pin, and want to save it to the onboard micro-sd, is that possible? or I need to use an external sd shield?

I use 1.5.3-intel.1.0.4 arduino for galileo on os x 10.10.1

it always compile error like:

avr/io.h: No such file or directory

Am I using the wrong library? (this is the library that I use for arduino uno)

if this is a stupid question, please forgive me.