Delta Drive, Delta Trust & My Drive · Search, notes and versions
How do I find duplicate files in Delta Drive?
Short answer: Use the Duplicates lens in Index & notes (or the Analytics card). It groups files with identical contents, shows the space you'd save, and lists only proven matches.
Open Index & notes and choose the Duplicates lens. It groups files whose contents are byte-for-byte identical and shows what keeping one of each would give back. Analytics has a card for the same thing.
It lists only proven matches: files it hasn't been able to compare yet are counted separately rather than guessed at. Review the group, then use Move to Trash on the copies you don't need — they stay recoverable from Trash.
For duplicates on your Mac rather than in the drive, see Duplicates in the manual.