What would happen if I removed (I have no idea if it would let me) some of these HDX folders.
        
        
     
Good question.
So as an experiment I decided to delete everything that the system would let me from my file repository folder (I am not recommending this, just saying).
Not an easy task but easy enough.
I had to Take Ownership of the File Repository folder and cascade that down to all subfolders and files.
Then I had to grant myself NTFS (security) permissions to that folder and cascade that down to all subfolders and files after blocking inheritance from the parent folder.
Then I just selected all folders in the FileRepository folder and deleted them.  Some of which would not delete as they were being "used by another program".
Anyway, I...