I can't see 30 minutes of fire protection being all that useful in a big fire. The Curie temp of hard drives seems to be quite low, depending on the exact plat

I can't see 30 minutes of fire protection being all that useful in a big fire. The Curie temp of hard drives seems to be quite low, depending on the exact platter formulation. A target temp of ~800C is far too high. In a hot fire, I wouldn't expect the data to last more than 10-15 mins, 72 hrs of water protection might be enough. But this still makes less sense than keeping copies of data off-prem somewhere - preferably a very very long way away. And preferably multiple copies. There may be reasons (privacy, security...) why you might not want to do that. But still. An encrypted off-prem solution, even if it's multiple NAS boxes in various offices and not a cloud thing, is going to be far more robust than a drive safe.