There are 3 methods which are all very simple to use. 
  1. Drag and Drop Feature

Allows you to ‘drag and drop’ a file or folder for backup

     2.  Explore computer

Provides a directory tree view from which files and folders for back up can be selected.


     3.  Search for files

This mode allows you to look for files with specific file extensions. A wide range of selection is available here.