Dupe guide

Find duplicate files in your Dropbox folder on Mac

Dropbox folders accumulate conflicted copies and duplicates from years of syncing. Here's how to clean them up safely.

4 min read

Dropbox has been syncing your stuff for a decade, which means a decade of edge cases: conflicted copies, files you re-added that were already there, folders shared with you and then copied locally, full migrations from another cloud service that you dragged in once. Your Dropbox folder is bigger than it needs to be.

Two paths

The native way: Finder + Dropbox web

You can find some duplicates manually:

  1. Open the Dropbox folder in Finder.
  2. Cmd+F and search for “conflicted copy” — these are files Dropbox created when two devices edited the same file at once. They’re often safe to delete.
  3. Sort folders by Size in List view and look for paired files with identical sizes.
  4. Verify pairs in Preview or with shasum before deleting.
  5. Drag duplicates to the Trash; Dropbox will sync the deletion and keep a 30-day version history on the web.

Conflicted copies are easy to spot by name. Everything else — duplicates from re-adds, partial migrations, shared-folder copies — is invisible to a filename search.

The Dupe way

Dupe hashes contents, so duplicates show up regardless of how they got into Dropbox.

  1. Install Dupe and open it.
  2. Click “Add Folder” and select your Dropbox folder (usually ~/Dropbox or ~/Library/CloudStorage/Dropbox).
  3. Click “Scan.” Dupe walks every file with SHA-256.
  4. Review duplicate groups. Look for paths with “(Conflicted copy)” or paths in folders you remember importing from elsewhere.
  5. Move duplicates to the Trash. Dropbox syncs the deletion to the cloud and to your other devices.

A few Dropbox-specific notes:

Safety:

One scan over a long-lived Dropbox folder typically catches dozens of conflicted copies and several gigabytes of accidental duplicates.

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