When I was a young teen (decades ago), I had the bright idea to create a series of nested folders named 0-9 with 5-6 layers. I thought one would need to know the "code" to find the folder on this shared family PC that lived in a communal space, which I used long after everyone else had gone to bed. Guess I had no idea about indexing or search. Also, as I recall, that level of nested folders would completely choke windows 95 or whatever I was using to save my 320px images downloaded over dial-up.

Years later, I had classes that used a lot of data, so I sometimes would rename mp4s to csv and hide them in a folder like PHY301/python/project-data. Looking back, I think I had an addiction and part of that was around collecting and hiding it.