A Foundry server keeps each world in its own folder and loads the one named in App.cfg. Switching between them is a config change, not a deletion.
1. Find the saves
- Stop the server in the Game Panel.
- Open the Files tab and find the save folder for the server. Each world is a folder named after its world name.
2. Switch world
- Note the exact folder name of the world you want.
- Open
App.cfgand setserver_world_nameto match it. - Start the server and check the console for the world it loaded.
3. Download a copy
- Stop the server so nothing is being written.
- Download the world folder from the Files tab.
- Keep it off the server. A copy that only exists on the server is not a backup.
Do this before a game update, before a large change and before anything you are unsure about.
4. Upload a single player world
- Stop the server.
- Find your local Foundry save on your PC, under your user profile.
- Upload the world folder into the server's save folder, matching the structure of what is already there.
- Set
server_world_nameto that folder name and start the server.
5. Rules that avoid lost factories
- Always stop the server before copying a world. A save copied while it is being written is often unusable.
- Never delete a world to start fresh. Change the world name instead.
- Use Stop rather than Kill so the server writes a final save.
- Set
autosave_intervalto something you can live with losing.
Open a ticket from Support in the Client Area if a world will not load, and tell us the world name you expect.





