This document discusses the roles that libraries can play in supporting researchers. It outlines challenges around digital preservation such as hardware and software obsolescence. It also discusses how the British Library actively preserves digital content through projects like the Flashback Project. The document then examines thesis workflows and how they are becoming more diverse with different file formats. It argues libraries need to more proactively support PhD students through the whole research process. Finally, it proposes roles for libraries at the institutional and national level, including advocacy, infrastructure support, training, and engaging with services like web archives.