Smart Collection Bridge 15.02 won't show images on external drive

I can see images in my folders on an external drive using folder navigation -- So Bridge can see the the images. However, when I build a smart collection (or use smart collections built before upgrading Bridge) I get a message that there are no images.

Reading the older boards, I tried using Edit >Find> HardDrive and that did not work. Then I tried Edit>Find>Drive>Subfolder and it found a few images. For the Smart Collection to have something to work with, it seems I need to "Find" my search term one folder at a time on the external drive. I don't image it should work this way. 

I checked Privacy > Files & Folder and Full Disk Access, and the settings imply that Bridge should have access. Any insights into getting Smart COllections to work with an external drive would be most appreciated.  (BTW, I updated my OS to Sequoia today, but that did not fix the issue.)  ~Cheers, Kathy