These are folders that are in your Runtime folder for Poser. You cannot view them in the program. You need to access them from your computers' browser to view them.

The Geometries folder is where Poser stores the object files it uses for figures and props. If you open it (change nothing), you find a list of more folders. Some by Poser, some by third parties vendors.

The Libraries folder is the name of your regular libraries in Poser. Scene files, Pose files, Cameras, hands, etc. Like Geometries, it has more folders listed by vendor names.

Textures Folder is where Poser finds the materials to plug into your figure or prop. As with Geometries and Libraries it contains more folders listed by vendors. These folders by the vendors is where they store the files and materials Poser will look for to add to your figure or prop.