Move the com.rockstargames.gtasa folder containing the OBB files to: Internal Storage > Android > obb .

Install the 2.10 APK file, but do not open it yet .

Before installing custom scripts or modified packages, ensure your hardware and software meet the necessary requirements. Device Specifications

Inside, you should see:

Since you will be installing an APK that is not from the Google Play Store, you need to give your device permission.