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# Excluding files from scan

You can tell Decloner to ignore certain files when scanning for duplicates.

Decloner will ignore Time Machine folders on external disks and hidden folders by default.

## To control which files to ignore:

Open Decloner Preferences by pressing ⌘, (Command-Comma) or choosing Preferences… from the Apple menu.

Setting Decloner preferences

On the Filters page, add file or folder names to ignore using plus and minus buttons.

The next time you scan for duplicate files, Decloner will ignore file names in the filter list.

### Related Topics

Scanning for duplicate files