DupScout allows one to categorize detected duplicate files by the file extension, file type, size, user name, last assess time, last modification time and file creation time. After finishing scanning the specified disks or directories, DupScout performs automatic file categorization and fills the list of detected file categories, which is located just under the list of the duplicate file sets in the main GUI application.

By default, DupScout categorizes all files by the file extension and shows a list of all types of detected file extensions sorted by the amount of used disk space. For each category, DupScout shows the number of files, the amount of used disk space and the percentage of the used disk space relative to other file categories. Use the 'Categories' combo box to categorize files by the file type, last access time, last modification time or creation time.

One of the most useful features of DupScout is the ability to browse duplicates by one or more specific file categories using file filters. For example, in order to see all files that were accessed 2-3 months ago, select the access time-based file categorization mode and double-click on the 'Files Last Accessed 2-3 Months Ago' file category. DupScout will filter the currently displayed list of duplicates and show all sets that were accessed 2-3 months ago.