On Android, go to new game or continue game, click down left on export and cloud save. Than use file explorer (I prefer total commander, open source and without ads), the file is in main folder, send it to yourself via email, on desktop same procedure, download the EK.bak file, open the game, go to new game/continue game and klick on export and cloud save, then import from file.
Here a video for export part on Android
I can also make one for steam but I think the explanation is easy enough