Oxygen Not Included Save File Location
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.
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.
Other games
- Slay the Spire Save File Location (PC)
- Subnautica Save File Location (PC)
- How to Transfer Your Red Dead Redemption 2 Save to a New PC
- Sons of the Forest Save File Location (PC)
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.