How truly sad...
I've worked in vaults like these... I was allowed to wander through this steel-housed section of a "paper store" that had an inert gas protection system... main building had a water dousing system... it was all steel walls, breeze-block and minimal flamables and wiring...
I have a photo of myself holding the master tapes to Free Live; gave me goose-bumps; this was prior to the re-issue, and I was marveling at the tracks that had not been issued... All Free's tapes were together... All of their albums...
In a short time I had found a stack of Bob Marley material, a bunch of Hawkwind material... I ran out of time...
When we look back over time, I wonder how much we have already lost to history... Homer was one of the great Greek writers, but iirc only two of his primary works are known to exist today...