The duplicate scanner checks your personal user folders:
- Documents
- Downloads
- Desktop
- Pictures
- Music
- Videos
It does not scan system folders (Windows, Program Files), hidden files, or system-attributed files. This is by design -- the scanner focuses on your personal files where duplicates are most common and where cleaning is always safe.
Files smaller than 1 KB are also skipped, as these are typically system files or configuration fragments that are not worth tracking.