We’re in love with the Stardew Valley mobile port (if you can’t tell by our review) but one of the coolest things about it is how the actual save game files for both the mobile and PC version of Stardew are completely cross-platform compatible and portable if you’re willing to spend a bit of time moving stuff around. It’s important to note that if you use any mods on the PC, you’ll want to remove any of them first as mods obviously don’t exist on mobile (yet, anyway).
If you have an existing Stardew Valley game save on your Mac or PC, the first thing you need to do is find the save data. On Windows, hit the Windows Key and R then in the “Run" box that pops up, paste this: %appdata%\StardewValley\Saves and hit enter. Similarly, on the Mac, open the finder and press Shift, Command and G all at the same time to bring up the “Go" box where you’ll paste the following path and hit enter: ~/.config/StardewValley/Saves – Each will be named based on your character with a number behind it, i.e. Eli_293857293 this folder contains two files that has all your farm data.
Now that we know where these are, the next step is to transfer them to your iPhone or iPad. Make sure you’ve got Stardew Valley installed on your device, and the latest version of iTunes on your computer, then connect your iOS device and open iTunes. Near the top of iTunes you should see the icon for your device, click that, then look for the section that says “File Sharing." From there, look for “Stardew Valley Documents" and you’ll see any save data that’s on your iOS device. These folders contain similar save data as the PC/Mac folders from the first step.
So, if you want to bring your save game from your Mac/PC to iOS, grab the whole Eli_293857293 (or whatever your save is named) and copy it into the iTunes “Stardew Valley Documents", and hit “Sync". It shouldn’t take long to sync, at which point you can open up Stardew Valley and load your farm. To go the other way, you basically do the opposite in iTunes and copy the folder from “Stardew Valley Documents" to the appropriate location from the first step.
This might all sound a little confusing, but it’s shockingly simple once you actually start going through the process. The iTunes file sharing stuff is intentionally super easy to use, and once you do it the first time you’ll be able to transfer your saves as much as you want. For more information, along with some troubleshooting steps if you run into any weird problems along the way, check out the Stardew Valley wiki page on game saves.