Can't change permissions to allow read and write on external drive
I upgraded to Monterey, and among many other new problems, I now can't copy files or folders to a portable drive. I can read files and folders on this drive, and I can copy from that drive. I cannot copy anything to the drive. I followed instructions to create a root user to allow this permission, but that user also did not have the necessary permissions.
What I'm doing is opening a finder window on the portable drive. Then I Get Info. In Sharing and Permissions, there are three users: system (R+W), wheel (R only), and everyone (R only). I never created a user named "wheel" that I know of. My user is jamesmckenna; this user does not appear in the list.
I click on the lock and open it using my user password. With the lock unlocked, I click under Privilege to change permissions, and the error "You don't have the necessary permissions" etc. appears. Nothing I do makes any difference. I can read and write to a different portable drive, just not this one with the messed up permissions.
How do I give myself permission to read and write on this external drive?
I'm on a late 2016 MacBook Pro. OS is 12.2.1.
MacBook Pro
