How do I get a Save ID for my save??
So it's just the number? I'm trying to get my save from my android to my PC
where do I get the save ID so I can transfer the save to another device?
I don't quite understand your question. You might have expected that the game has a save sync, however, this is not the case... If you want to transfer the saves, you need to use any file sharing service and transfer the saves from android to PC.