If you wanted to go, even further beyond. I have what I call my "dead server." Just a home PC with zero internet or bluetooth connections / capabilities. But it's also capable of housing quite an amount of storage. It would be better to call it my true digital master vault. Houses my entire digital life backup and every digital copy of every important paperwork I've come across throughout the years. Call me paranoid but I've always wanted a copy of everything, so my collection has gone up throughout my life and has seen many upgrades / overhauls. It's also catalogued, tons of sub folders, and the typical encryption.
Only downfall is, it's easier to break into a house compared to a dedicated data storage center. Thankfully I never leave that PC logged in and running, power cable unplugged too just to be safe.