Two collections - how to drag and drop - tag - meta - HELP!

Hi, I am not totally clear on what you are trying to do, but you could try out SongKong

Points of interest:

  1. Can work on any size collection, fully automated
  2. Can automatically tag your music
  3. Can rename/reorgnize files based on existing metadata
  4. Delete Duplicates can find duplicates and automatically remove the lower quality duplicates (based on bit rate/audio format etc)
  5. Roon friendly, helps Roon identify more albums

You can run Fix Songs task and test out matching of songs and renaming/reorganization of songs in preview mode without any license purchase necessary, and it will show you exactly what has been matched, metadata added, folder structure ectera.