1. A contents management method for a media management apparatus, the method comprising: displaying at least one first graphical user interface object representing an external device connected to the media management apparatus and second graphical user interface objects representing contents stored in the connected external device; receiving a selection of a first or second graphical user interface object of the displayed first and second graphical user interface objects; detecting an input drag of the selected graphical user interface object; filtering, in response to detecting the input drag, the displayed first and second graphical user interface objects based on one or more attributes associated with the dragged graphical user interface object; and displaying, in response to filtering the displayed first and second graphical user interface objects, a filtered set of graphical user interface objects, wherein displaying the filtered set of graphical user interface objects comprises: detecting a drag of a search object comprising a keyword to an area where the first and second graphical user interface objects are displayed; checking metadata associated with the first and second graphical user interface objects displayed in proximity to the search object; and sticking, to the search object, graphical user interface objects comprising metadata comprising the keyword.