How do I increase SW Explorer's speed of searching for the "Where Used" function? Indexing files?

I am generally searching a network drive, and I thought leaving SW-Exp on all night would let it index the files on that drive. But it didn't seem to work, as it takes just as much time searching for where a part/assembly is used as before. Am I missing a step, or is there some way of forcing SW-Exp to index that drive?

Do not currently have a PDM tool.

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