Do these 'Library' items head only for Poser's core run-time or, optionally, external libraries ?? 
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I actually have very little beyond the 'install' pack and a few 'saves' in Poser on C:, but ~4TB of folders with a zoo of items, each with own run-times or 'importable' files spread across several data drives...

I link in what I need for a project, un-couple when done...