JDiskReport is described as 'Enables you to understand how much space the files and directories consume on your disk drives, and it helps you find obsolete files and folders' and is a popular disk usage analyzer in the system & hardware category. There are more than 50 alternatives to JDiskReport for a variety of platforms, including Windows, Mac, Linux, BSD and Flathub apps. The best JDiskReport alternative is WinDirStat, which is both free and Open Source. Other great apps like JDiskReport are WizTree, Baobab Disk Usage Analyzer, TreeSize and SquirrelDisk.