Free and lightweight, it uses contextual ribbons to highlight each folder in your File Explorer, using bars to compare the file sizes and listing off the amount of data stored within each. The reason TreeSize is such an excellent utility program for Windows users is that its UI was built for the platform. After years of working or gaming on the same PC, the program debris starts to pile up.
Heavyweight programs like Photoshop or modern video games can eat up gigabytes of storage rapidly, especially if you’re not uninstalling as you go. Technology is decades past the floppy disk and the CD-ROM era, but even today in the age of cheap terabytes, it’s still possible to run out of space.