I use several NTFS external disks with my Catalina Mac (for PC file exchanges). None of them are Spotlight-indexed, and that's fine as it is not necessary: macOS has no trouble seaching the disks without Spotlight.

All of a sudden one of the external disks stopped being searchable. macOS is unable to find any files. On my other external NTFS disks there is no problem with the macOS search function. (and Spotlight is not enabled there either)

(Rebuilding the Spotlight index is N/A as Spotlight is not used.)

I have the feeling something in my macOS is messed up regarding that particular external drive. Pehaps a setting that got corrupted? Is there such a thing as a .plist or so for a drive that can be deleted and recreated?

What could be the cause of the basic search function not working on an external USB drive?

  • Open Disk Utility, select the NTFS disk with issue, right-click it and click on Run First Aid... ... does it give any error or is the issue fixed?
    – sfxedit
    Jan 9, 2021 at 8:54
  • I had tried that - no errors. Also did a chkdsk on Windows platfrom, all report OK
    – erratic
    Jan 9, 2021 at 12:24

1 Answer 1


OK this is really weird, but it turns out that the cause was the one-character name of the disk...

It was named "Q", but when i renamed it to "Q backup" it was suddenly searchable again. Does not matter wich letter, or even a digit, as soon as I only use one character the disk becomes no longer searchable.

When I give its name 2 or more characters - voilà, searchable again.

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