Every note-taking app handles file attachments differently. Most of them do it poorly. What I’ve found surprising is that I actually like what Org mode does with attachments. I might be the only one who does.
The way I have Emacs configured, dragging a file into an open buffer window will prompt me with a few options, the one I use being “Attach file”. This then copies the file into a subfolder of whatever directory is configured as the org-attach-directory
. This subfolder is named based on any ID property set in the Org file. This means I end up with a directory tree that looks like this: