QDirStat is a graphical application to show where your disk space has gone and to help you to clean it up.
This is a Qt-only port of the old Qt3/KDE3-based KDirStat, now based on the latest Qt 5. It does not need any KDE libs or infrastructure. It runs on every X11-based desktop on Linux, BSD and other Unix-like systems.
Step to install on SLE 12 SP3
1. Login as root
2. Add repository
zypper addrepo https://download.opensuse.org/repositories/home:shundhammer:qdirstat-stable/SLE_12_SP3/home:shundhammer:qdirstat-stable.repo
3. Refresh repository and trust key ( choose “a” )
zypper refresh
4. Install qdirstat
zypper install qdirstat
5. Open qdirstat (terminal)
6. Choose directory
Have a nice try đŸ™‚