You can find safe, reliable save files at dedicated GTA modding communities. These sites offer a variety of saves, including "All Missions Finished," "100% Completed," and even specific mission saves.
C:\Users\[Username]\AppData\Local\Packages\RockstarGames.GrandTheftAutoSanAndreas_...\LocalState\ /Android/data/com.rockstargames.gtasa/files/ 3. How to Install the Save File You can find safe, reliable save files at