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 KDE. The best alternative is WinDirStat, which is both free and Open Source. Other great apps like DiskUsage are WizTree, TreeSize, ncdu and Baobab Disk Usage Analyzer.DiskUsage alternatives are mainly Disk Usage Analyzers but may also be System Cleaners. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of DiskUsage.