FindFatFolder

FindFatFolder is a disk space calculator capable of scanning any specified drive or directory, in order to identify the size of all subfolders.
This type of application helps you find out which files take up the most space on your HDD and decide whether you want to keep, delete, or store them on removable media drives.

No setup required

This is a portable app, so you can save it anywhere on the hard disk and just click the executable to launch FindFatFolder. Otherwise, you can keep it stored on a USB flash drive to directly run it on any PC effortlessly. More importantly, it doesn't modify Windows registry settings.

Calculate folder sizes and find out the largest folders

It's packed in a user-friendly interface that doesn't put emphasis on looks, yet it's easy to navigate. After scanning a drive or directory, FindFatFolder calculates the size of each subfolder and lists them in another column. These are sorted by size in descending order, and you can find out their full paths.

Calculate size by file type and identify files

Any selected subdirectory can be scanned, and you can find out how much disk space it occupies by file type. The tool shows the total files, rate and size for each file extension, in addition to the name, size and full path for each file. It's possible to open a file or folder's location in Windows Explorer, as well as to copy file or folder paths via the right-click menu.

Evaluation and conclusion

It had minimal impact on computer performance in our tests, running on low CPU and RAM. We haven't come across any stability issues, as it didn't hang, crash or prompt error messages.
To sum it up, FindFatFolder offers a simple and effective method for calculating disk space occupied by files and folders, and it can be easily handled by anyone.