It’s not just your files, although backing them up is important. If we get hit by another Carrington event it will quite possibly fry a lot of electronics.

I have a very rudimental Faraday Cage setup for this scenario. It’s just a steel bucket with a steel lid that’s lined on the inside with cardboard, and with aluminum foil on the outside to seal off the joins. But if I get notice that such an event I’d about to hit I’ll be throwing some critical smaller electronics (notable a raspberry pi and a mini monitor), cables, and a mini solar panel+plus inverter into it (along with my backup device) and sealing it up with more aluminum tape.