DiskSavvy Pro allows one to analyze disk space utilization by the file extension, file type, last assess time, last modification time and file creation time. After finishing analyzing the specified disks or directories, DiskSavvy performs automatic file categorization and fills the list of detected file categories, which is located just under the directory view in the main GUI application.

By default, DiskSavvy 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, Disk Savvy 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 DiskSavvy is the ability to analyze disk space utilization 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. DiskSavvy will filter the currently displayed file hierarchy and show all files that were accessed 2-3 months ago.