Back in the ‘80s, when they were starting to roll out PCs to the rank-and-file at work, my sister was training a gentleman on how to use his new toy. It had a boot disk for the program (remember those?) She told him he had to treat it carefully and not lose it, as he could not run the program without that disk.
So he stuck it on the side of his file cabinet with a magnet.
I had a work-study job at the tech. college I attended, and sometimes I helped the computer admin. One day she gave me a precious 5.25" diskette that I was to insert into every PC in the lab, run a series of updates off of it, and then return to her. She had spent a bunch of time crafting this diskette so it was very important that I be careful with it.
Once I completed the task, I carefully peeled the label off her diskette and applied it to a blank that I had (the original diskette was safely tucked away in my locker). I then wrote a note: "All machines in the lab updated!" and affixed both the note and the diskette to the steel door of her office with a powerful magnet.
A few hours later a very excited computer admin pulled me from class. Luckily she had a good sense of humor when I retrieved the real diskette and gave it to her. LOL!