For a couple of decades now I've used Yarp's P3dO Explorer.  I'm not sure if the process of deleting all files associated with an asset is in the Pro version or the Free but I believe even with the Free you'll see all references (objs, textures) with their full path.  I use it as an alternate library (among other things) so I don't have to navigate to a different Runtime within Poser.

https://www.renderosity.com/freestuff/items/85040/p3do-explorer-28-free-version

https://www.renderosity.com/marketplace/products/142437/p3do-explorer-pro-28