In the popular imagination, archives are remote, largely obsolete institutions: either antiquated, inevitably dusty libraries or sinister repositories of personal secrets maintained by police states. Yet the archive is now a ubiquitous feature of digital life. Rather than being deleted, e-mails and other computer files are archived. Media software and cloud storage allow for the instantaneous cataloging and preservation of data, from music, photographs, and videos to personal information gathered by social media sites.

In this digital landscape, the archival-oriented media theories...