The simplest way to classify files located in a directory is to enter the directory name in the directory entry located under the main toolbar and to press the 'Classify' button located in the top-left corner of the main toolbar. On the profile dialog verify that all the parameters are selected correctly and press the 'Start' button to begin the file classification process.

Depending on the speed of the disk and the amount of files that should be processed, the file classification process may take from a couple of seconds for hundreds of files to a few minutes for large file systems containing millions of files. During the file classification process, DiskSorter will display the process dialog showing the total amount of processed files and the amount of processed storage space.

Once the file classification process is completed, DiskSorter will display a hierarchy of file classes and categories sorted by the amount of used storage space. For each file class or category, DiskSorter will show the name of the category, the total amount of files in the category and all subcategories and the total amount of the disk space used by all files in the category and all subcategories.

Click on a category item to open the category and show nested subcategories, classes and files. Select one or more categories, classes and/or files and press the right mouse button to perform a file management operation on the selected items. For example, select one or more classes or files, press the right mouse button and select the 'Copy To' menu item to copy all the selected files to another location.