error mounting external drive Big Sur error -119930872

I am inserting external Drives but they are not showing up. I went to disk utility and I tried First Aid and then mounting and I keep on getting "could not mount "New Volume". (com.apple.diskmanagement.disenter [error -119930872.)] error message. I tried it with multiple drives and in multiple user profiles on the same Mac. Any help is appreciated.

Thanks

I am having the same issue. I get the message: Could not mount “New Volume”. (com.apple.DiskManagement.disenter error -119930878.). It initially worked but when I moved some files from my machine to make room for Monterey update, I am getting this message. So many important files are in this drive and I haven't seen anything that could be of help anywhere else. Let me know if you get it to work and I will if I do on my end. \

Good luck!.

same issue here. Very problematic. I am certain it is not a problem with the hard drive. all 5 of my drives are doing the same thing -- same error code. Just started recently. Apple broke something and needs to fix

Am seeing same issue when am trying to connect external hardisk, is there any resolution to this issue ? am on Mac Monterey version.

I got this error when trying to use a USB 3.1 HD plugged into a USB-C docking station on my MacBook Pro. When I tried on a Mac Mini with its own USB Type-A ports, the drive mounted happily. Makes me think the error could be a problem with the adapter.

The "fix" for me is log out the existing user and then log right back in, same user, no changes. The drives appear in finder and disk util and work as expected.

I spent an hour+ with Apple support and their answers were to "repair the drive", "run first aid", and "reinstall the OS". Starting in recovery mode, the drives show up and are mounted. As soon as I restart normally, the same issue...drives are unable to be mounted.
I am not sure why the process of logging out and back in and booting into recovery mode can't illuminate what might be the issue.

Log out and back in...drives visible and usable. But every time you disconnect the drives you have to do the same thing in order to mount them.

error mounting external drive Big Sur error -119930872
 
 
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