I don't exactly remember because it was awhile ago when I exported all my notes and I no longer have an account to check. I remember I had to google how to do it, but once I found out how to do it, it was very easy. There was just a button or link somewhere (maybe under account settings?) that allowed me to download everything as a zip file. Oh, and I remember I had to do it on the desktop website and not on a mobile device.