Is there a way to backup my notes (the stock notes app) and store that copy of backup on external hard drive?

I do all my student work with notes app, so there are more than 900 notes, i want to be sure and protect myself in case of disaster with icloud/apple id or something else, so is there a way to backup all iCloud information and store that copy of backup on an external drive (so that notes would be there also)? (is there a way to do that on mac or iphone, preferably without any 3rd party apps?)

i found only a Pdf export option for notes. but it does export one by one. so it's too slow in that way.

would be glad if anyone could help!!