Can you add the games personal memory usage to the logfile? Rule out external factors?

Well I'm using 6GB of my 16GB without the game running. How much does it need? Does it just endlessly memory leak until it crashes?

No save file because it didn't save. No mods.

19901.695 Warning WriteFileGuard.cpp:57: Writing C:\Users\teelo\AppData\Roaming\Factorio\saves\_autosave2.zip failed; previous version (if any) should still be available
19901.695 Error ParallelScenarioSaver.cpp:114: Saving scenario failed: bad ...