How to install apps into SD card on ODROID-C2 marshmallow.

Install android 6.0.1 into 8GByte eMMC.

http://odroid.com/dokuwiki/doku.php?id=en:c2_release_android

5GByte userdata.

Install many apps.

storage space running out.

Insert SD Card.

Use as internal storage.

Enable sdcard like internal storage.

Settings -> Apps -> Storage

Move "Angry Birds" to "SanDisk SD card".