Despite all the discoveries made in this field the last 100 years - time techonology is one of man's least developed sciences. Exactly 'Hitting' time and space of the past is still one of the major obstacles to regular time travel. The Pre Universe Storage Device eludes the problem of ending up inside solid (occupied) space by approximately refering to pre-universal time. It is not truly known what the nature of space was at that time, but it works well for storage.