I agree it's a weird bug with Monterey. I ran into the same issue with my external Samsung 4TB SSD. After I upgra ded to Monterey my drive immediately started acting weird and then I received this message "Could not mount “4TB SSD”. (com.apple.DiskManagement.disenter error 49218.)" I've tried all kinds of software including Terminal to force mount and I'm still unable to mount this external drive. I have over a decades worth of family photos in iPhoto on this drive most likely all lost. Thanks MacOS Monterey!
xsox1951
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution