sorry, i thought thats the only error message.
Desktop\blahblah\skip_first_line_and_write_to_temp_file__experiment\skip_first_line_and_write_to_temp_file__experiment.ino:3:19: fatal error: SdFat.h: No such file or directory
#include <SdFat.h>
^
compilation terminated.
exit status 1
Error compiling for board Arduino/Genuino Uno.