Ren’Py Android save files are stored on your phone’s internal storage.
1) Open a file manager (Files by Google works).
2) Go to: Internal storage > Android > data
3) Find: org.renpy.<yourgame> (name can be slightly different).
4) Open: files > renpy > <YourGameName> > saves
If you can’t open Android/data (common on Android 11+):
1) Connect your phone to a PC with USB.
2) Enable File Transfer (MTP) on the phone.
3) On the PC open: Android/data/org.renpy.<yourgame>/files/renpy/<YourGameName>/saves
Backup tip: copy the whole “saves” folder.