For APK installation from other than Play Store make sure you enable “Allow installation of apps from sources other than the Play Store”. Go to Setting>Security and tick the box on the right.
Copy OBB folder in Android
- You can use ES File Explorer to extract and copy your game OBB folder.
- Tap on your OBB.zip file.
- Choose ES Zip Viewer.
- Choose extract, and choose the path of /sdcard/Android/obb.
Copy OBB folder using a PC
- Connect your device with USB to your PC.
- Extract the OBB.zip first to any folder (recommended: desktop).
- Copy the extracted OBB folder.
- Find the OBB folder in Phone\Android\obb and paste the game OBB folder.
Example of OBB folders