Tried to change the save game folder. It went badly.
target destination d:\freeorion\sav
The backslash key was not accepted as input
Navigating the folder structure gave me an error because no file type was specified.
I am uncomfortable with this being in my Appdata folder. At an average of 5MB each, the 600 turns of savegames REALLY added up.
Hence I wanted to put this on a partition I do not back up.