Oxygen Not Included Save File Location
Last verified: 2026-09-11
Save file location (Windows): %USERPROFILE%\Documents\Klei\OxygenNotIncluded\save_files
- Windows
%USERPROFILE%\Documents\Klei\OxygenNotIncluded\save_files
Here's exactly where Oxygen Not Included stores your colonies on PC, how to open the folder, and how to back it up.
Save file locations
%USERPROFILE%\Documents\Klei\OxygenNotIncluded\save_files
Full path: C:\Users\<YourName>\Documents\Klei\OxygenNotIncluded\save_files . Each colony is a .sav file; an auto_save sub-folder holds automatic backups.
Cloud saves
Oxygen Not Included uses Steam Cloud. Cloud copies sync with the local save_files folder — let a sync finish before restoring a manual backup so it isn't overwritten.
Moving to a new PC? Follow the step-by-step Oxygen Not Included save transfer guide to copy your progress across without losing anything.
How to open the save folder
- Press Win + R to open the Run box.
- Paste %USERPROFILE%\Documents\Klei\OxygenNotIncluded\save_files and press Enter.
- Copy the whole folder somewhere safe before editing, modding, or moving PCs. (In-game: Options → Feedback → Browse Save Files.)
Save problems & fixes
ONI colony won't load or is corrupt
Open the auto_save sub-folder inside save_files and copy a recent automatic .sav over the broken one. On Steam also verify integrity of game files.
ONI save is missing after reinstall
Confirm Steam Cloud finished downloading before launch; if the folder is empty, the cloud copy may not have synced — restart Steam and wait for the sync.
FAQ
Where is the Oxygen Not Included save file on PC?
At C:\Users\<YourName>\Documents\Klei\OxygenNotIncluded\save_files. Each colony is a .sav file.
How do I back up an ONI colony?
Copy the .sav file (and the auto_save folder) from save_files to a safe location. Let Steam Cloud finish syncing first.
How do I open the ONI save folder from the game?
Go to Options → Feedback → Browse Save Files to jump straight to the folder.
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Need another game or a quick backup? Use the Save Location Finder — pick any game to get its exact save path plus a ready-to-run backup command.