@sduck: the random advance config file is needed because androids file system has thousands of strange files in it and thousands of symbolic links. So you have to set a filter for the folders. "/mnt" should be good. Maybe we should look if it is not possible to create this file when the plugin is compiled.
Yes, I was going to suggest including that file with future builds. Just in case anyone besides me ever uses that plugin. I have mine set to just read the root of the internal card and the root of the external drive. There's instructions in the manual about how to edit it further. When you generate the random folder file using the plugin and this txt file, it works pretty well - you still get a few non- music folders, but they're not a problem, they don't play during random folder advance.