New Poster, New Question

[OldCOBOLprgmr]

New poster here.  I'm in the process of moving off Plex and onto Jellyfin.  I'm running a Linux Ubuntu MATE server with lots of horsepower and lots of storage.  My Plex setup took a while to set to my liking, but now I find I nearly have to start all over again.  Without going into too much detail, I have both internal and external storage devices that contain my media files.  The move to a different media server (JF) gave me the opportunity to re-organize my storage, but even though I put files into "collections" on disk, JF doesn't recognize them as such.  So even though I might have something like this simplistic example, 

Harrison Ford
  - Star Wars
  - Raiders of the Lost Ark
  - Blade Runner
Patrick Swayze
  - Ghost
  - Road House
  - Red Dawn
Humphrey Bogart
  - Casablanca
  - Maltese Falcon
  - African Queen

You get the idea.  So, now I have folder named Harrison Ford, Patrick Swayze and Humphrey Bogart, but JF doesn't see these as collections.  I've had to create collections in Jellyfin.  Now, I can list the contents of the disk and the files line up appropriately, but I still have to add them, one by one, to the collection I want the assigned to.  I've tried to find a way to click (there's no selection box) multiple items to add them all at once, but I can't seem to find a way to do this.  Is it possible? 

Sorry if this is a redundant question.  I searched the forums but couldn't find an answer.