If you have insufficient internal memory space on your android device, you may have a difficulty installing the game.

Please refer to the following steps to make sure that your device has sufficient internal memory space before installing the game.

 ■ How to Optimize Internal Storage Space: Delete cache of applications in use

- [Settings] > [Apps] > Select apps > Storage > Click [Clear Cache]

■ Delete data & apps not in use

- Delete apps, photos, videos not in use

※ How to clear cache may vary depending on the device.