For my personal stuff, I have my permanent file box with birth certificate, key legal documents, and key data documents such as accounts and passwords. (theinspiredroom.net)
Now, you can use something like a small filing box for papers... or maybe your stairs. (liftingrevolution.com)
If heavy objects, like file boxes, are put on high shelves and not secured properly, they can fall on employees and cause serious injuries. (hickeyandturim.com)