Okay, installed and ran Disk Warrior on the external HD. It tells me this:
DiskWarrior scanned the disk named "1 Seagante Mac HD Clone" checking all files and folders for damage and potential compatibility problems.
• Permissions were verified and any necessary repairs were made.
• 6,341 Files had property list data checked.
• 16,143 Files had resource data checked.
• The maximum folder depth on this disk is 21. This does not exceed the maximum recommended depth.
• The system symbolic link files were checked and no problems were found.
• 7 Files had property list data that was found to be damaged.
• 14 Files had resource data that was found to be damaged.
Time: 1/14/24, 2:05 PM
DiskWarrior Version: 5.0