how to transfer save file from old phone to the new one ? (RB College)

So I got new Android phone and I already installed RB College. but I want to transfer the save file from old phone (Android too) to new one. any idea?

I already check the game file on Android/data/com.newstargames.retrobowlcollege but it's empty.

there is no way I want to lose 11 year dynasty