How can I back up my GTA San Andreas iOS save if I need to reinstall it later?
The save files are stored in a folder called "GTA San Andreas User Files", which can be found under "My Documents". It is also used to store your settings and other user files. The directory should stay in tact even if you uninstall the game, so after reinstalling it you can get back up to speed immediately.
To be safe, copy the directory with its contents somewhere safe.