When I was in college I had folders of notes and it's read and updated regularly. Once I got issued a work laptop; the personal one sometimes don't get turned on in days... and rapidly became outdated.
Do you have a phone (doesn't have to be one you're using)? At least on android, you can install syncthing and use it as a middleman. I use emacs org mode for many of my notes and this system works well. My computers are NEVER online at the same time but the phone is always on so it will always be up-to-date with the latest files. It also serves as another backup location. Works wonders.