The program will scan hard disk and will display a list with all files and folders. You can dive in and explore each folder based on its size.
Once you detect a big file and you want to delete it, with right click you can do that. Also, you can go directly to a subsequent level through right click context menu.
Using filters options you can include or exclude certain file name or path (wildcard, regex and full name are supported).
Items can be sorted through top menu.