This manual provides a guide for the development of a digital archive, starting from the decision to create a Digital Archiving System through its establishment and development to its continuous change, adaptation, and maintenance. It applies the Digital Archiving Life Cycle Model, which reflects the key characteristic of digital archiving: its circular and continual character, a cyclical process in which stages follow one after the other continuously, without an end point, like hours on the clock. A new cycle begins at the end of the previous one, starting a new iteration of a digital archive development. The Life Cycle Model also draws attention to the need for taking action and actively managing a digital archive throughout its life cycle and presents the wide scope of responsibilities involved in the digital archiving process.