In the old days, we signed paper contracts...
and you kept these in a file or drawer somewhere in your house. And after so many years, you weeded out contracts and warranties from the things you no longer owned. And at some point, instead of saving papers, you scanned your documents into a computer. And IF you were a real gem, you stored those files on an external drive that you kept locked away in a water/fire proof container. And then those in the know started saying you really didn't need to keep papers or scans anymore because everything was saved by the company on a computer. Marie Kondo, I'm looking at you!
And then you need to talk to said company about a problem you are having with their service/product and the company says, "Oh, we don't keep records for more than two years." (even though your warranty is still valid.) So then it is up to you to show THEM a copy of your paper contract.
I went on an archaeological dig in my home yesterday. Apparently I skipped the phase of weeding out papers for things we no longer own. I saw my life before me. Years of purchases and service contracts and kids artwork and school stuff and high school stuff (MY highschool, not my kids), my Brett Kavanaugh pocket calendars, state commemorative quarters collections ETC...all in containers in one small upstairs room.
And then I found it, in an file folder in a box marked A to E which was unfortunately placed in a rubbermaid container marked office and therefore not visible from the outside. Whoo hoo! THE CONTRACT I NEEDED. With copies of the paper checks made out to the company. I may seriously need this for a lawsuit. Otherwise I think I'd be tough outta luck.
Moral of the story: Save it and let your kids deal with it after you die. 