First of all, I have a Samsung Galaxy S4 Google Edition (with android 4.3)
I have an SD Card, but it is not uses to transfer APP Data into it. It is just for my music.
Anyhow, at the beginning, I had serious crashes. I managed to fix that by freeing up some space. I used to have around 200MB and now I have 1,1GB as stated above.
Now when the game is running, everything is fine no crashes, only occasionally freezes. I can stop at the evening, the game, as long as it is in the memory, resumes just fine. I only have problems when I want to load the save game. Today it took arround 20 attempts. What I do is I reboot the phone, sometime it works sometime not. Most of the time I just stop the process from running, load up the game and try to load the savegame. When the game force closes, I try again until it works.
But as I said before, once it manages to load the game, the game runs fine.