At face value, "digital archive" seems a contradiction in terms.
An archive is more than a room full of dusty things. As an archivist in a still active institute, items are created every day that need to be added to the archive. This ranges from minutes to artifacts while part of it is digital. The main tas is to organize these documents and record where they came from, when, why and how. Keeping provenance (context of creation etc) is essential and cataloguing the digital item with tags just like a physical item keeps it accessible and findable in the future: the key tasks of an archive.
Hello, I am that contradictory creature, a digital archivist... well, it was my old job title, I took a new position and my job title has me back as a generalist as this is not a big enough place to have people just doing digital. Are you asking how we digitize existing analog materials or how we care for recent born-digital files and data sets?