I had this error just suddenly disconnected my external HD my itself with no reason.
NOW, I cannot mount my disk and ALL important files are stored.
I don't have this problem with previous OSX for the past 15 years EXCEPT for OSX CATALINA.
Any Help?
MacBook Pro 15", OS X 10.10
Hello mcGregore,
Welcome to Apple Support Communities!
I understand that you're getting an error when suddenly your external HD was disconnected by itself. I'd like to help.
Usually the error you received does pop up when a device is suddenly removed. Did you it the plug by accident or remove the wrong cord?
Try the steps in the article below for repairing a storage device.
Repair a storage device in Disk Utility on Mac
Let me know if that worked for you.
Thank you for using Apple Support Communities.
Take care!
(com.apple.DiskManagement.disenter error 0.)
