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Check to see if Spotlight indexing is ON for that volume:

 
The NAS needs to support that.

If it's a Synology check if Universal Search is active and it's index is ok.
 
The NAS needs to support that.

If it's a Synology check if Universal Search is active and it's index is ok.
it is a synology, and i think i did turn off universal search becasue it was freezing my NAS. i will turn it back on and see if that solves it. thanks
 
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