6.1.3 Principles of Digital Preservation Digital Mass Storage Systems (DMSS) Principles The following information is based very closely on the practical aspects of Data Protection Strategies from the UNESCO Guidelines for the Preservation of Digital Heritage. It is modified only to reflect the possibility of systems that incorporate non-automated back up, and to reflect the single format concerns of audio digital preservation. The section is included with the kind permission of the author (Webb 2003:16.13).