Premium Asset Organization

Hello all. Roll20 has changed a lot since I last had to build stuff (over a year now). Something I've always wanted was a way to organize my purchases. I see that there's now sub folders for "my library". That's great! Now, here's the question... Can I stuff my "purchases" which are normally under "premium" in there somehow? I'm trying but can't seem to achieve it. What I want to do is move, or create a copy/link for various stuff. My goal:  Folder-people. Folder-textures. Folder-map building indoor. Folder-map building outdoor. Folder-map building dungeon. Folder-monsters. Is this possible somehow? I have dozens of packs I've purchased over the years, and roll20's search feature is a joke. So I have to manually scroll through all those folders when trying to find something. Thanks for any help you can offer. Im starting back into a new game that's going to require a lot of maps (my last one only needed a few), and it would be great if I could find everything easily. Search for "pine"...3 results some elf, some other elf, porcupine. I wanted to find a pine tree. Stupid search engine.

WOOHOO! RIGHT CLICK! Ok, I have solved my own problem by trying right click. So, I have a different question then. Does "copying" an asset pack into a folder eat up my storage space? If so, what sort of order of magnitude? (obviously every pack will be different)

Ok...wtf. The very first one I moved went with no problem. Nothing else will move into any folder. Im horribly confused. The Romans moved, but nothing else will. Either into the same folder or another.

  ? O  Premium Assets  P  My Library o  Add c  Upload Collapse MAP BUILDING - TEXTURES Collapse MAP BUILDING - DUNGEONS Collapse MAP BUILDING - OUTDOOR Collapse MAP BUILDING - INDOOR Collapse MONSTERS Collapse PEOPLE Expand 100 - Romans, Soldiers, and Knights

Apparently I can copy any of the assets into the library with no problem, but not the folders. However, I can then open one of those copied groups and individually DRAG them into subfolders. While this works, it's a nightmare since ill have to drag thousands of tokens. What am I doing wrong with copy to folder?