The premium version of App Cloner automatically copies any OBB expansion files during the cloning process. This is useful because you don’t have to copy the files manually but it won’t work in case you want to copy the APK to another device. You can install the APK but the device won’t have the required expansion files. Cloned apps can’t normally download these files from the Play Store due to the package name change.
For this reason I’ve added a new option called ‘Bundle expansion files’, which allows including the OBB files inside the cloned APK. The files will be extracted when the app is launched the first time (or when the clone is updated).
While this increases portability of cloned apps it makes generated APKs a lot larger. It also doubles storage requirements of installed clones since the OBB files remain inside the installed APK file (which is kept by the system) and are extracted at runtime.
Unfortunately it doesn’t work with Kodi. It seems any time you embed some larger files in the APK Kodi fails to launch. Maybe that’s why they started using expansion files in the first place…