Experience has shown me NOT to move the directories from where they are as the files look for addons and additional information and if it can't find them, you will have to load them individually. But you can move some stuff around to better suit your needs, and these are the Poses, Props and Character folders.

I have moved all my character morphs into one folder... looks like this:
...Runtime/Libraries/Characters/DAZ People/Victoria4/
...Runtime/Libraries/Characters/DAZ People/Michael4/
...Runtime/Libraries/Characters/DAZ People/Aiko4/

...Runtime/Libraries/Pose/Morphs/Caleb4/
...Runtime/Libraries/Pose/Morphs/Hayden/
...Runtime/Libraries/Pose/Morphs/Mira4/

...Runtime/Libraries/Props/Themes/Stonemason/Dark_Room/
...Runtime/Libraries/Props/Themes/Stonemason/Urban_Ruins/
...Runtime/Libraries/Props/Clothing/Victoria/Armour/
...Runtime/Libraries/Props/Clothing/Michael/Armour/

Do NOT move any of the other directories under 'Libraries/...' or you will find problems loading MATs and MORPHs to your items.

If in doubt....leave alone! Best solution.

This is a problem with different suppliers of files having various formats and directories. I wish they followed a standard that suits us all, but that is another story. My best solution for you is to set up another Directory elsewhere for additional files and copy third party files there. If you have purchased them from the DAZ website, they are mainly executables and will copy directly into the '...Contents/' directory.

Confusing.... YES!

There is a search feature built into DAZ Studio that you can always refer to from time to time if you cannot find things, but then suppliers don't always name their stuff accordingly. Best of luck... :)