DiskUsage is described as 'Provides a way to find out which files and directories on the SD card of your Android phone are consuming the most space. It displays diagram with directories/subdirectories proportional to their size. Users are allowed to zoom in to look at specific directory content' and is a popular disk usage analyzer in the system & hardware category. There are more than 50 alternatives to DiskUsage for a variety of platforms, including Windows, Mac, Linux, BSD and Flathub apps. The best DiskUsage alternative is WinDirStat, which is both free and Open Source. Other great apps like DiskUsage are WizTree, Baobab Disk Usage Analyzer, TreeSize and SquirrelDisk.