Is ‘Stardew Valley’ a Cross Platform Game? How to Play With Friends

When creating this new save file, if you select the “Four Corners” farm, you’ll automatically begin with three cabins on your farm, making it incredibly easy to start a co-op save file. Just invite your friends once you’ve moved past the opening credits to begin.

Unfortunately, all of the progress is kept on the host player’s console, meaning you won’t be able to take any of the progress with you when you log off. There is also no way to transfer items from one save file to another.

Source: https://www.distractify.com/p/is-stardew-valley-cross-platform