If you run Disk Usage Analyzer, you will probably see that everything is taking a lot less space than you think, unless you have a bunch of videos included. If you are not using a lot of videos, then I would recommend putting everything on the eMMC because it is so much faster than the SD card. I have an Odroid XU4 and that's the way I have it set up.
Installing and upgrading help
Storage of courses
This discussion has been locked so you can no longer reply to it.