Using rsync for backing up my stuff on an external HDD
Quick solution, use: First make a dry run ('n') to make sure if rsync is doing right
rsync -anPv Documents/Pictures/ /media/HDD/Pictures/
Then sync the folders
rsync -aPv Documents/Pictures/ /media/HDD/Pictures/
If you want to skip some folders:
rsync -aPv --exclude Documents/Pictures/UNWANTED Documents/Pictures/ /media/HDD/Pictures/
This is a good place to check-out more details http://www.thegeekstuff.com/2011/01/rsync-exclude-files-and-folders/?utm_source=feedburner