[circlesguy]

I used to use Yahoo Notes for this. When they shut it down I created my own web app for this, and now it is available to anyone: https://circles.app

Features: Notes can be accessed from any web browser. Web site is mobile friendly. You can share notes with others. You can encrypt notes. And the most important feature: You can download all your notes by clicking "Download all" and you get a .zip file with plain text files (with line breaks compatible with your OS).

Other features: You can save links to random websites, you can create lists, store some files and so on.