Apps similar to TreemapScan include WinDirStat, which is free and open source. Other options are WizTree, Baobab Disk Usage Analyzer, Filelight and SD Maid SE. There's no shortage of Disk Usage Analyzers like TreemapScan, with more than 50 alternatives for Mac, Windows, Linux and Android.
Disk Usage Analyzer - a free program to analyze disk space of the computer. It helps you to quickly and easily determine the size of folders on your computer, as well as the number of files they contain.
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The most powerful disk space sizing and analysis utility there is! Answering the Who/What/Where/When of your Disk Space.
Breathing Room is an open-source macOS storage and maintenance app for exploring disk usage, understanding app activity, and reviewing cleanup actions before approving them.
