When you connect your Android device to PC in order to copy over the ChatStorage.sqlite or Media folder, it's possible that you can't see the WazzapMigrator folder. This is due to a known Android bug that prevents recently created files to be shown when connected to PC.

You can easily solve this: just reboot your phone in order to see the WazzapMigrator folder on your PC. If you still can't see it, just place the ChatStorage.sqlite in the Download folder, it will be automatically detected anyway  

USB charging mode - 1/2
USB charging mode - 2/2