Hollow Knight

Checkpoint64 has a preset for Hollow Knight: it already knows where the save folder is, backs it up automatically and keeps every version. Everything this site has on Hollow Knight:

Save file location

Windows: %USERPROFILE%\AppData\LocalLow\Team Cherry\Hollow Knight
macOS: ~/Library/Application Support/unity.Team Cherry.Hollow Knight
Linux: ~/.config/unity3d/Team Cherry/Hollow Knight
Launch options

-window-mode exclusive

Hollow Knight

Save file location

Launch options