du -shc /home/%user%/folder/* – sorted occupied space in a human readable format

find . -name “foldername” -exec rm -rf {} \;  – delete all folders “foldername” and their content

rsync -arP source_folder user@host:destination_folder – update and sync of files through ssh. Works faster than scp, cp and anything else. Really powerful stuff. If you add -delete it will also clean the destination folder if there are no such files in the source folder