1)   Disk Analyzer 1.9.21
Disk usage analyzer will help you to understand all these and other subtleties of the disk space organization.

 2)   Disk usage analysis 2.1.26
Modern computers are huge systems including thousand and ten thousands of elements.

 3)   163 Disk space manager 2.3.0.3
Program Directory Size of Moleskinsoft offers the powerful tool of disk usage analysis.