In the folder picker, paste the Windows path into File name and press Enter. Choose the Big Ambitions folder; the page finds the newest save across the company folders inside it, whose generated names cannot be told apart by eye.
Save folder · Windows
%USERPROFILE%\AppData\LocalLow\Hovgaard Games\Big Ambitions\SaveGames\Big Ambitions
On macOS: ~/Library/Application Support/Hovgaard Games/Big Ambitions/SaveGames/Big Ambitions
Game text · en.json lives here (recipes and capacities)
C:\Program Files (x86)\Steam\steamapps\common\Big Ambitions\Big Ambitions_Data\StreamingAssets\locale
The game autosaves every five minutes. Your browser may call folder access an "upload" or ask to "let this site view files"; the save stays on your computer. Checked on game build 3674; the Python runtime the page needs is about 6 MB, fetched once and cached.