Hubby wants a fire-proof filing cabinet

I think it's high time hubby's buys a filing cabinet back to keep them out of Gordon's reach. He keeps telling me where he keeps his files and i keep forgetting what he tells me most of the time. I have this habit of stashing everything that he gives me on top of the cupboard. What to do, that's the only way to ensure they are safe.

We saw one at Parkson the other day. But it's too big and so expensive. I have to source for some discount office supplies. He says he'll need to buy a few more for the office also. More work for me to do. But then, good also. At least he'll know where all his important files are. I wonder how much would a fire-proof one costs. Hopefully not oo expensive.