[Captain Kwok]

I believe you are describing log text files and combat replay files...in the settings.txt found in the data directory, you can make these all false and they'll stop being made. Scroll through the list (they are about mid way down in the list).

The reason why you are getting so many is because it generates a file for each player each save and with autosave on, that's a lot of files.

Create Log Text Files for Players := False
Create Log Text File for Game := False