[scrapheap]

A Faraday Cage should give some protection from an EMP - you could probably build a good one for very little money.

There would certainly be differences between HDD and SSD, which I'll be interested to hear about.

Depending on the size of the digital information that you want to store then I'd be inclined for going for a solution that would also give you redundancy (i.e. multiple copies of your data spread over multiple faraday cages)

[thraneh]

That's what I thought too. A basement with concret walls/floor/ceiling should have enough rebar to act like a Faraday cage.

It's not a lot of information (say, <1GB), but it's business critical and I'm somewhat distrustful of cloud solutions.

[scrapheap]

If you have a small set of really important data to protect that doesn't change regularly then you can always make it EMP proof by printing it out.

[thraneh]

Thanks. There was another discussion around this topic only a few days ago: https://news.ycombinator.com/item?id=31149427