If you want, you can limit count of Auto Saves, that are will be rotated every Auto Save.
For example, if you entered value 2 in menu Set period between auto-saves and selected Sim Hour in menu Period between auto-save is counted in, Auto Save will be triggered every 2 Sim Hours :)! Default value is: Sim Hour.
Period between auto-save is counted in - it can be Real Hour, Sim Day, Sim Hour, Sim Minute.
Set period between auto-saves - Period between Auto Saves.
Enable or disable Auto Save with Enable or Disable Auto-save menu.