Creating a branch in SVN is like creating a copy of a folder. The command line command is
$ svn copy svn+ssh://host.example.com/repos/project/trunk
-m "Creating a branch of project"
but if you do it in SmartSVN, it’s shown below.
Just make sure you don’t create a folder in your branches folder and then copy the contents of your origin folder into your newly-created branch folder. That would result in a separate branch for each folder within your origin folder as opposed to one branch of your entire origin folder.