Windows 10 Strange problems recently appear caused by microsoft ransomeware protection

 recently I had some strange issues crop up that made no sense, and if they generated errors at all they also did not make sense.

First was this one: https://robert.guildig.org/2023/03/nero-burning-rom-does-not-see-blank-or.html

the next one happened this morning. I was making a backup to blu-ray (which worked fine).
I (being a bit old school) went to a command prompt and attempted to issue this command in a folder the path of which is c:\users\username\documents\backup

command was as such dir /s d: > backup24.txt
simple right?
no! it comes back with file not found (I don't remember the exact wording).
What the heck! file not found?! it should just create the file.
now I think I'm losing my mind because I've been working on computers since dos 2.11 I've done this MILLIONS of times. after confirming I haven't suddenly developed dementia (by googling the command), I try creating the file in the GUI (which works) and run the command again.
the results:
not enough space on the disk
there's 759 gigs free!

Remembering what happened yesterday I go in to ransomware protection and sure enough CMD.EXE is blocked from accessing that folder and a bunch of other folders (most of which I never use).

I unblock it and the command works perfectly.

If the command had come back with "access denied" I would have dealt with it differently, but the unconventional errors that did not match the actions being prevented was not helpful.

I don't know when Ransomware protection was installed. my googlefu says possibly sometime in 2019, but that it was not activated by microsoft until recently (because I didn't activate it or even know about it). All this worked in september 2022.