These commands did not work for me. Unable to locate package.
May not work in some cases but Arch you are using has at least one of the following command:
you will be prompted with a password. Some commands like "gksudo", "gksu" are just links to "gnsu" they work the same way.
Still I would like to figure out how to get root access for folders with GUI/drag and drop
You have been told above by many and any of those opinions may run in your system. Actually "gksu", "gksudo" are gnome ways; while "kdsu", "kdesu", "kdsudo" are kde ways. Another way of knowing what your system is currently using is to try
ls -l /usr/bin/*su*
and you will know which of the above is available. However, the shortest way is
in the terminal, then followed by issuing
that should bring you to a root file manager.
There is no such thing as drag-and-drop implementation of set-user-to-root, so far to my limited information. But somehow you or any one can make a script to make that happen. Drag and drop is the gambit of proprietary OS's, making dangerous things easy for the customers in order to ensure business and profit. That seems to be far from philosophy of unix oriented OS's.
Hope that helps. Goodluck.