The game saves automatically and stores the save in your system folder. You can't lose your progress unless you delte the APK or play with a blocking setup like itch's "sandbox mode"
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That depends on what is wrong with your system. The safegame, and multiple backups, are stoed in the system folder. Its not touched/changed when you update the game and cant just get lost.
On PC you can easily access the folder with the beckups. On Android it depends on your device and if you are playing with an unsupported system its a whole different story.
Find your Windows save file (savedata_slot0.dat):
- Or manually go to C:\Users\>USERNAME>\AppData\LocalLow\Tiny Secret Games\Snapshot!\
Next to the savedata_slot0.dat there are various backups of it