How to find and delete duplicate files safely

Two files with different names can hold the same content, and two files with the same name can be different. Compare content, review every group and always keep one original.

In your browser

1. Open the web app and allow folder access.
2. Choose a folder and press Deep scan, then Find duplicates.
3. Check the groups. The oldest copy is marked as the original.
4. Use Smart select, export the CSV if you want a record, then delete the selected copies.

On Windows

1. Add drives and folders to the queue, optionally limit the scan to photos, videos or documents.
2. Press Start. Results show one original and its duplicates per group.
3. Double-click a row to make it the original, then delete. Files go to the Undo Vault.

On your phone

Add photos and files in the phone app and find duplicates. Phones do not let a website delete files, so share the list and delete the marked copies in your Gallery or Files app.

Safety checklist

• Never delete from system folders such as Windows or Program Files.
• Keep the original in the folder where you expect to find it.
• If apps use the files (libraries, games), prefer hardlinks over deleting.