hey there @Gimmepickles92, to find the save go to this file path,
C:\Program Files (x86)\Steam\steamapps\common\Stonehearth\saved_games
if you don’t know which save is the newest one, you can check the screenshot inside the save folder, then zip the individual save’s folder (not the entire saved_games folder) and upload it directly to the discourse either by using the upload button 
, or by dragging and dropping the .zip file.
if the save is larger then 10mb you could upload it to a site like googledrive or dropbox and provide a download link.
hope that helps 