docs: def make_required_folders(self):
          """Makes all folders declared in the config if they
          do not exist.
          """
          for folder in [
              self.pending_folder,
              self.usb_incoming_folder,
              self.outgoing_folder,
              self.incoming_folder,
              self.archive_folder,
              self.tmp_folder,
              self.log_folder,
          ]:
              if not os.path.exists(folder):
                  os.makedirs(folder)