Thanks for the info, I deleted a DB-WAL file that had grown excessively, which doubled my free space and game saves fine now.

I confess to having had trouble with a full C: drive before and this was the first thing I checked but I have 15GB space according to treesize

When I am quire far advanced in game Running lots of trains and over 300 vehicles game fails to auto save or manual save giving the below error

Failed to write save data to 'C:\Users\Capns\AppData\Roaming\Captain of Industry\Saves\Strategic Sanctuary\1.save': Win32 IO returned 112. Path: C:\Users\Capns\AppData\Roaming\Captain of Industry\Saves\Strategic Sanctuary…