code: private static String checkFileURIScheme(Collection<URI> uris) {
      for (URI uri : uris)
        if (uri.getScheme().compareTo(JournalType.FILE.name().toLowerCase()) != 0)
          return "The specified path is not a file."
              + "Avatar supports file non-shared storage only... ";
      return "";
    }
docs: For non-shared storage, we enforce file uris