Check permissions/storage mount
The expansion file will always start with the name main. and end with .obb . 3. Create the Target Folder
Copy your downloaded OBB file into the com.rovio.gold folder.
If the cache clear didn't work, your expansion files are likely corrupted. The most reliable fix is a fresh install.
A: Try restarting your device, checking for updates, clearing cache and data, checking storage space, or reinstalling the game.
: Move the downloaded .obb asset directly inside this newly created com.rovio.gold directory folder.
Before applying fixes, identify your root cause:
Manual OBB install (advanced)
The OBB file is in the wrong folder on your device.