Create the patch APK expansion file

Unity only automatically creates the main APKThe Android Package format output by Unity. An APK is automatically deployed to your device when you select File > Build & Run. More info
See in Glossary expansion file, but you can manually create the patch APK expansion file if the application requires more storage space. For information on how to create the patch APK expansion file, see Android’s Development checklist documentation.

When you create the patch expansion file, you must include the unity_obb_guid file within it so Android recognizes the APK expansion as being compatible with the APK. To do this:

1. Find the main APK expansion file that Unity generates. It’s a zip archive.
2. Extract the files from the APK expansion zip archive.
3. In the list of extracted files, find the unity_obb_guid file.
4. Copy this file over to the patch expansion file.

Additional resources

• Create the main APK expansion file
• Host APK expansion files