1. Download APK first, then copy to your Android device's SD card

2. Install APK, DO NOT open app

3. Download obb files, then rename to 'main.11023.com.square_enix.android_googleplay.dq5.obb'

4. Copy obb file to /SDCARD/Android/obb/com.square_enix.android_googleplay.dq5/main.11023.com.square_enix.android_googleplay.dq5.obb