I was thinking about saving my data devices into some Faraday cage so may not be affected by unexpected EMPs or similar phenoms that may endanger their content, does anyone know if anyone sells these type of safe?

Also, I'd like to know (since this deviced are told to need grounding) if a pot with some wet dirt could do, given that I won't just expose the cage outdoors, or are there any other complicated methods that can substitute grounding?