Expand memory to Dragino using sdcard

Insert SDCard

go to this page

https://www.arduino.cc/en/Tutorial/ExpandingYunDiskSpace

download

YunDiskSpaceExpander.zip

extract it and open the .ino file

Change all the Serial. to Console.

**** Except Serial1***** there is 3 of those

and just follow the tutorial. on that page.