GNOME disk usage analyzer
Disk Usage Analyzer is a graphical, menu-driven application to analyse
disk usage in a GNOME environment. It can easily scan either the whole
filesystem tree, or a specific user-requested directory branch (local or
remote).
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It also auto-detects in real-time any changes made to your home
directory as far as any mounted/unmounted device. Disk Usage Analyzer
also provides a full graphical treemap window for each selected folder.