Checkpoint64 has a preset for Factorio: it already knows where the save folder is, backs it up automatically and keeps every version. Everything this site has on Factorio:
Factorio
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Save file location
Windows:
%APPDATA%\Factorio\saves
macOS:~/Library/Application Support/factorio/saves
Linux:~/.factorio/saves -
Backup guide
A 200-hour Factorio base is one bad mod update or one crashed autosave away from gone. Checkpoint64 keeps every version of your save — megabases included — so a disaster is one click from undone. Free download for Windows, macOS, and Linux.
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Server ports
UDP 34197 -
Launch options
--nogamepad--force-opengl -
Sharing with friends
How to share your Factorio world with friends, from playing live to taking turns when the host is offline.