I have a backed up digital and a print version of a "bureaucracy-folder" where those kind of documents go. There is a section for things that I reasonably often

I have a backed up digital and a print version of a "bureaucracy-folder" where those kind of documents go. There is a section for things that I reasonably often need access to (e.g. certificate of employment, copy of working visa, vaccination certificate, etc.), the rest is basically just an append-only store. I like to keep my personal life simple, so there is not much documents overall and i pretty much never needed access to anything older than weeks. When I was freelancing I had a more elaborate document management system in place regarding that work, but now this works just fine.