Export/Import[]
If you want to share your story with the community, or you want to play someone's story you can Export/Import it.
Export[]
The Storyteller stores saves (like your campaign) in files with .sav extension. On Windows, you can find these files in the "C:\Users\<username>\AppData\Local\StoryTeller\Saved\SaveGames" folder. Select your .sav file containing your campaign (e.g., MyCampaign.sav), and share it with those you want to, whether it's your friends or the community.
Import[]
The game stores campaigns in .sav files in the saves folder. If you've downloaded a <campaign>.sav file created by someone else (e.g., MyCampaign.sav), you need to place it in this folder. On Windows, you can find these files in the "C:\Users\<username>\AppData\Local\StoryTeller\Saved\SaveGames" folder. Once you've copied the .sav file to this location, start (or restart) The Storyteller, then navigate to the Load Game menu (Play -> Load), where you'll find the campaign.