Unable to create an authorized user for an external drive.
I've been able to create a bootable drive, but am unable to add an authorized user. When I select the external drive as start up I get "Startup Disk - Startup Disk is trying to unlock the Startup Disk settings. Enter your password to allow this." I enter my password and click UNLOCK. Then I get the following "This volume does not have any authorized users for this computer." I select Authorize User... which is followed by "Please enter the password for the user" I enter my password and click OK. "Select an owner." I click Authorize then get "Please enter the password for the user" and SO IT GOES.
I am never able to add an authorized user!
Consequently I cannot add RAID software to my external drive which is vital to recovering from an internal disk failure.
Mac Studio, macOS 12.6