This free-for-personal-use software utility analyses storage disk usage, and then presents the gathered information in graphical format(s) viz. a directory tree, or a pie chart.

Disk Space Fan Pro is a is not only a duplicate file finder, but also a powerful disk space analysis tool for Windows. It helps you to free up disk space by quickly finding and deleting big, useless files.

PA Storage Monitor shows what you are storing and supports your storage manager tasks. Many rich file reports, including file owner information available.

1Tree (100% FREE) lets you see all directories/files size in 1 tree, in order to let you to do the manual disk cleaning work easily. It loads drives, folders and files with their sizes (sorted by size), and provides you with the common commands.

MeinPlatz "My-Place" offers an easy and fast way to scan the hard disk for lost disk space. With analysis on a percentage basis and grouping by folders, file types, size or date. It has also a nice print and export function.

Folder Size Explorer is a simple and free Windows Explorer clone with the added ability to calculate folder sizes. Microsoft's built-in Windows Explorer does not calculate folder sizes which means you have to manually select folders then click properties to determine their...

diskreport.net allow to generate an online report of disk space usage. Periodic run allow reports of size and file count variation, usefull to find growing files or directory.

dua (-> Disk Usage Analyzer) is a tool to conveniently learn about the usage of disk space of a given directory. It's parallel by default and will max out your SSD, providing relevant information as fast as possible.

Disk Space Fan is a powerful disk space analysis tool for Windows and it is a freeware. It helps you to free up disk space by quickly finding and deleting big, useless files. It displays disk space usage with a nice chart. You can navigate the folders easily with the chart.