I know I could and should encrypt whole drives but I want another layer of protect specific folders when my devices are unlocked, a password. I want the folders to behave like regular folders where I can add or remove files as usual, without a clunky UX like password protected zips. I looked it up and didn’t find any straightforward solutions.
I have a separate encrypted partition that I can mount/decrypt/unmount with my filemanager (or something like pmount) by clicking on those little arrows. Much nicer than whatever on-top-of-the-filesystem solution I used previously. It happens to be on a microSDcard that just sits in its slot forever.