I’m going to assume that you’ve read my previous post about backing up your digital devices and are therefore safe in the knowledge that, should you suddenly drop your phone in the toilet, you haven’t lost all your photos and contacts. But not everything is digital these days, so what do you do with the other stuff? There are certain documents that you should always keep a copy of — birth certs, marriage certs, wills, contracts, title deeds, passports, warranties, tax receipts, etc. — so n...