docs: def load_and_save_raw(self, parent_level="CellpyData"):
          """Loads the cellpy or raw-data file(s) and saves to csv"""
          sep = prms.Reader["sep"]
          if self.use_cellpy_stat_file is None:
              use_cellpy_stat_file = prms.Reader.use_cellpy_stat_file
          else:
              use_cellpy_stat_file = self.use_cellpy_stat_file
          logger.debug(f"b.load_and_save_raw: "
                       f"use_cellpy_stat_file = {use_cellpy_stat_file}")
          self.frames, self.keys, errors = read_and_save_data(
              self.info_df,
              self.raw_dir,
              sep=sep,
              force_raw=self.force_raw_file,
              force_cellpy=self.force_cellpy_file,
              export_cycles=self.export_cycles,
              shifted_cycles=self.shifted_cycles,
              export_raw=self.export_raw,
              export_ica=self.export_ica,
              save=self.save_cellpy_file,
              use_cellpy_stat_file=use_cellpy_stat_file,
              parent_level=parent_level,
              last_cycle=self.last_cycle
          )
          logger.debug("loaded and saved data. errors:" + str(errors))