If you have a specific .save file (e.g., from Patreon or community forums), follow these steps to install it on Android:
Navigate to Android/data/com.kompasproductions.summertimesaga/files/ . Find the persistent file.
: Before overwriting, copy your original saves folder to a safe location.
: Rename your old saves folder to saves_backup before pasting new files.
A: The developers sometimes provide a completed save on their Patreon posts, such as the 0.20.1 save file.
Installing external save data requires moving files into the game's internal directory.