Disk Usage Analyzer is a graphical, menu-driven application to analyse
disk usage in any GNOME environment. Disk Usage Analyzer can easily
scan either the whole filesystem tree, or a specific user-requested
directory branch (local or remote).

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.