Ngā Taonga Sound and Vision is aspiring to become a digital archive – moving away from analogue materials and processes towards digital ones. As part of our digital preservation efforts, we have begun to apply a prioritisation model to digital materials stored on at-risk generations of LTO (referred to in this paper as Legacy LTO).
These LTO tapes range from generations 3-6 and are at risk due to format obsolescence and the possibility of tape failure. Some of the files are likely to be significant and unique, but others may either be insignificant or have been replaced by higher quality preservation files.
Ngā Taonga has recently developed a model for prioritisation of our collection to help inform our work, including preservation. We are now in the process of using this model to identify what percentage of the files on Legacy LTO are unique materials of high significance and access. This will help us make informed decisions about how to proceed with these items.
A case study was conducted with the files we had on a sample set of our LTO4 tapes. These files were analysed first with respect to the significance of their content and our ability to provide access to it and secondly, to understand the effects of file loss. We then considered a possible migration approach that combined these considerations.
The data gathered in this study has proven that our Legacy LTO tapes hold some unique files of high value alongside material that may not be worthy of migration. The results showed that applying a prioritisation lens in addition to an analysis of the impact of file loss could reduce the number of tapes we need to migrate.
This study will inform our migration plans. It also helps us to outline options for decision makers, including different levels of investment in migration based on impact of loss and value of content.

This paper provides a summary of our work-in-progress to adapt the University of Glasgow Special Collections and Archives’ Media Prioritisation Tool to assist in the reappraisal of unmigrated and under-described digital media carriers at the University of Kentucky Libraries. We added an element to this tool that incorporates appraisal criteria, such as archival research value, to our evaluation, as most of the digital media on our shelves meets the Digital Preservation Coalition’s definition of practically extinct or critically endangered. We required another criteria to guide the order in which we address the migration and long-term preservation of this born-digital backlog.

This paper examines the migration of born-digital records from the National Archives of Australia’s original in-house developed digital preservation system to Preservica in 2022-23. In particular, the paper will discuss decisions made about data clean-up, what was to be migrated, the tools developed to facilitate the migration, issues that arose during the migration and how they were resolved. The paper also looks at the verification and audit process developed to ensure all objects and metadata were migrated and discuss lessons learned.

We present a framework for mass migration of preserved content, where the owner of the content is a different party than the one which does the migration. This requires a close collaboration between these parties. In Finland, we have a centralized digital preservation service for various organizations (including museums, archives, libraries, universities, research institutes), and thus collaboration between the different organizations and the service provider is crucial to success for preserving content in the long-term, including migrations. We present our first migration project using this framework. This provides a solid base on how such migrations can be performed in the future; especially in our case, but also in a wider context.