Hi hotwork77
What brand of moisture and fire-proof safe is that picture showing? Is it available here? Looks to me like the COBRA safe by Chubb, right?
I thought safes are non-airtight? As such air (with mosture) will get in unless you're keeping your medias in media boxes which are airtight. Medias like flash cards, diskettes, tapes etc are small items so they can be kept in airtight media boxes which in turn can be kept in the safe. But cameras, lens, binos etc are larger items. To keep these items would mean the safe itself must be airtight. Alternatively, you can keep some silica gel in the safe to control the moisture level.
As long as the safe is not airtight then damage to the equipment due to temperature is still there