External USB 2TB Drive will not mount

Old4DProgrammer wrote:

I have a Samsung PSSD T7 2T USB External drive formatted with ExFat. I have been using it for Zip backups. I have a MacPro (late 2013) running Monterey. The drive has been working great for months. Suddenly now it will not mount.

I run Disk Utilities first aid, and it quickly tells me 'Operation successful.'

The drive does not mount.

I click on the Mount icon but it still does not mount.

I have gone into terminal and executed diskutil list

The drive shows up there.

/dev/disk2 (external, physical)

I then executed: mount/dev/disk2

The response is no such file or directory.

Ideas?

I have another backup set. So If no other ideas here, I can try reformatting the drive and copy the other set of backups to it.

https://discussions.apple.com/content/attachment/1d7f1caa-de1f-4fed-82a0-0a0c2f996793

Your image shows the disk as NTFS, not ExFat. NTFS new technology filing system is different from extended file allocation table (exFAT). For read and write access, NTFS typically requires installation of a special driver on the Mac. If you recently updated the MacOS or made other changes, you might need an updated version of that driver to access the drive. There are several different NTFS drivers, which one are you using, and have you updated it recently?

I would try reformatting it to the same format as your Mac's HD. If that doesn't work, maybe the drive is filing. How old is it?