Where Are Astroneer Save Files Located?
Astroneer Steam saves under the Astro folder, where the Microsoft Store version hides its own, and the Proton path on Linux.
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Astroneer on Steam stores saves as .save files in a SaveGames folder under LocalAppData/Astro, with autosaves sitting beside manual saves. Config lives in Saved/Config/WindowsNoEditor next to it, and Steam Cloud covers the Steam copy.
The Microsoft Store version is a different animal. It seals saves inside its Xbox container rather than the Astro tree, so the two editions do not share files. Linux runs the Steam build through Proton under compatdata for AppID 361420.
Where Astroneer stores this, by platform
%localappdata%\Astro\Saved\SaveGames
Steam edition .save files, autosaves included. Config sits beside them in Saved\Config\WindowsNoEditor. The Store edition instead uses its Packages container with Xbox cloud sync, so these folders stay empty there.
~/.steam/steam/steamapps/compatdata/361420/pfx/drive_c/users/steamuser/AppData/Local/Astro/Saved/SaveGames
Proton path for AppID 361420. Search for compatdata/361420 if your Steam library lives elsewhere. Steam Cloud still applies, so local and cloud copies can disagree after a crash.
Frequently asked questions
Can I move an Astroneer save from Steam to the Microsoft Store version?
Not by copying files. The Store build keeps saves in its sealed Xbox container, so there is no folder you can drop a Steam .save into. Keep a manual backup of the Steam SaveGames folder regardless.
Where are Astroneer config files?
In Saved\Config\WindowsNoEditor beside SaveGames, mainly Engine.ini and GameUserSettings.ini. Back up the whole Astro folder if you tweak graphics by hand, since a bad edit fails silently.
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