Does the Junk Yard clean junk files off my Mac?
Short answer: No. The Junk Yard is a clipboard history and quick-notes board, not a cleaner. It never scans for or deletes files on your Mac; to free up space, use Storage Studio's clean-up and moving tools.
No. Despite the name, the Junk Yard doesn't scan your Mac, find junk files or delete anything from your drives. The "junk" is the throwaway snippets you copy all day — the Junk Yard is a clipboard history and quick-notes board.
Clearing a scrap from the board only removes the scrap. If a card points at a file, the file itself stays exactly where it is.
To get disk space back, use Storage Studio's space tools instead — the one-tap clean-up, What's Using Space, and moving big folders or apps to an external drive. See Freeing up space.