Comment by ZiiS

Are we actually sure they didn't do due diligence?

This is the individual's work files of civil servants. These will overwhelmingly be temporary documents they were legally obliged to delete at some point in the last 8 years. Any official filings or communications would have been to systems of record that were not effected.

This is more that a very large fire, probably unlucky for once a decade, caused civil servants to lose hours of work in files they were working on. A perfect system could have obviously prevented this and ensured availability, but not without cost.