docs: def load(self, filename, offset):
          """Loads NTFS volume information
  
          Args:
              filename (str): Path to file/device to read the volume \
              information from.
              offset (uint): Valid NTFS partition offset from the beginning \
              of the file/device.
  
          Raises:
              IOError: If source file/device does not exist or is not readable
          """
          self.offset = offset
          self.filename = filename
  
          self.bootsector = BootSector(
              filename=filename,
              length=NTFS_BOOTSECTOR_SIZE,
              offset=self.offset)
  
          self.mft_table = MftTable(
              mft_entry_size=self.bootsector.mft_record_size,
              filename=self.filename,
              offset=self.mft_table_offset
          )
  
          self.mft_table.preload_entries(NUM_SYSTEM_ENTRIES)
  
          self._load_volume_information()