code: def save(self, filething=None, v2_version=4, v23_sep='/', padding=None):
          
  
          fileobj = filething.fileobj
          fileobj.seek(0)
  
          dsd_header = DSDChunk(fileobj)
          if dsd_header.offset_metdata_chunk == 0:
              # create a new ID3 chunk at the end of the file
              fileobj.seek(0, 2)
  
              # store reference to ID3 location
              dsd_header.offset_metdata_chunk = fileobj.tell()
              dsd_header.write()
  
          try:
              data = self._prepare_data(
                  fileobj, dsd_header.offset_metdata_chunk, self.size,
                  v2_version, v23_sep, padding)
          except ID3Error as e:
              reraise(error, e, sys.exc_info()[2])
  
          fileobj.seek(dsd_header.offset_metdata_chunk)
          fileobj.write(data)
          fileobj.truncate()
  
          # Update total file size
          dsd_header.total_size = fileobj.tell()
          dsd_header.write()
docs: Save ID3v2 data to the DSF file