Oh yeah, file storage and navigation literacy is in the toilet lol As well as just like basic Excel knowledge. I regularly run into people far younger than me who cannot navigate their own file systems or run a spreadsheet (stuff I learned middle school and highschool) without explicit guidance. And that isn't even getting into basic updates or how to navigate a Bios, which I learned as a kid just from just fucking around with old computer hardware. Shit is basically Legos these days (which honestly thank god, it was a huge pain in the ass having to sauder things).

Idk if it is tablets and smart phones specifically, but I personally blame Apple. They are the most responsible party in the appification of everything, and their status purely as a branded social symbol, good and reasonably priced hardware and software specs be damned, is what I find is the most common culprit. And it's not as if Apple doesn't have ok file storage navigation, it's just that of you aren't explicitly using it for those things, it is possible to never really run into it, whereas Microsoft is always just janky enough to require knowledge for basic operations. This is not praise for Microsoft btw, it is just that you learn the most by struggling with the tech.

Ultimately though, I think it really comes from the fact that most people just operate everything through their browser or apps and barely actually interact with their operating system. By creating a better user experience we have decreased the general computer knowledge.