Depends on what it is. Currently, on my laptop, I have music organized by group followed by album if I have ripped a CD for backup in case my CD stops working. Got a lot of blanks, just in case, for free.

Downloads isn't organized. Pictures are slightly organized, with images for background in a folder and a few other folders. Most everything in documents is in a folder inside the documents folder or a subfolder in the subfolders.

Desktop has folder has mostly the important things in it, like folder for appimages, emulators, other programs and related files that require their own folder, and a few miscellaneous files. Organization is something I have prioritized a lot more on my laptop to ensure I don't end up having a situation like with my desktop where it's a shitshow.

As for phone, I'm doing a lot better with organization because I set up a new phone I got maybe a month or less ago and have been doing good to organize. Just need to go into my SD card and fix some things up that haven't been organized for a long time, since my 2nd smartphone, back from ~2015-16. Mostly just music. Got over 500 audio files stored on an SD card, so you can imagine how insane it is to try and organize, especially if you feel daunted by that task like me.