I use folders for my data. a-z. This is the basic directory structure. b->books->management for example. Does not solve the fundamental problem of a file system that you also could file this under m->management->books I use recoll to index and find things. https://www.recoll.org/ And yes, I have a 20 TB HDD. Quite a bit of data and media. If someone knows how to make an encrypte mirror of my drive with https://www.op…
You can use symbolic links to connect directories and file to multiple parents.