Trashing / Erasing/ Removing / only Projekt Audio Folder

Hi, I’d like to get rid of some of my files in the Projects Audio Folder.
I have some sounds in the Trash of the Pool or unused which are references to an external Harddrive. These Sounds are shared with other Projects.

I only want to remove and erase unused files from my Audio Folder, not from all places. Is there an option I don’t see?
To prepare archiv beforehand is my solution as of right now, but that creates duplicates of sounds I really don’t need in the whole production process. Once I am finished with the projcet I do a “Backup” anyway.

Any ideas on this?


I’m afraid it’s not possible.