Sorry but I am not getting an answer I am after. Maybe I am not explaining myself very well so I will try again.
In the Poser Application there's a folder called "Runtime" and in this folder there are folders called: Geometries, Libraries, Textures etc. Well when I get a new Poser or Daz model it asks me to put the .obj files and material files into their separate folders within this "Runtime" folder.

But what I am saying is you don't have to have just this one
single runtime folder. You can create several runtime
folders, each with its own geometry, libraries, and textures
subfolders in it.

So is there a way to organize my files so I don't have to go searching through all the "Runtime" sub folders for the
files I want to back up?

There are probably lots of ways, but for me the way that works
the easiest is to just create several runtimes so
I don't have to wade through one huge runtime.