A multimedia data processing device for providing a graphic user interface, the multimedia data processing device comprising: a multimedia data processing unit configured to process a plurality of multimedia data corresponding respectively to a plurality of source devices; an icon generating unit configured to generate an icon representing the multimedia data, a controller configured to control the operation of the multimedia data processing unit and the operation of the icon generating unit, and to generate and provide a graphic user interface based upon the generated icon; and a display unit configured to display the graphical user interface; wherein the controller is configured to: display a plurality of source icons (31, 32, 33, 34) representing respective source devices; display a plurality of folder icons (35, 36, 37) respectively representing folders in response to a user selection of one of the source icons, wherein the selected source device includes the displayed folders, display a plurality of file icons (44, 45, 46) respectively representing files of multimedia data in response to a user selection of one of the folder icons, wherein the selected folder includes the plurality of files of multimedia data, output a first file of multimedia data in response to a user selection of the one of the file icons, use as the generated icon a first thumbnail image extracted by the icon generating unit from the first file of multimedia data, replace the source icon and the folder icon, representing the source device and the folder that include the first file of multimedia data, with the first thumbnail image, output a second file of multimedia data in response to a user selection of another one of the file icons, and update the graphic user interface by using as the generated icon a second thumbnail image extracted by the icon generating unit from the second file of multimedia data, and replace the source icon and the folder icon, representing the source device and the folder that include the second file of multimedia data with the second thumbnail image. a multimedia data processing unit configured to process a plurality of multimedia data corresponding respectively to a plurality of source devices; an icon generating unit configured to generate an icon representing the multimedia data, a controller configured to control the operation of the multimedia data processing unit and the operation of the icon generating unit, and to generate and provide a graphic user interface based upon the generated icon; and a display unit configured to display the graphical user interface; wherein the controller is configured to: display a plurality of source icons (31, 32, 33, 34) representing respective source devices; display a plurality of folder icons (35, 36, 37) respectively representing folders in response to a user selection of one of the source icons, wherein the selected source device includes the displayed folders, display a plurality of file icons (44, 45, 46) respectively representing files of multimedia data in response to a user selection of one of the folder icons, wherein the selected folder includes the plurality of files of multimedia data, output a first file of multimedia data in response to a user selection of the one of the file icons, use as the generated icon a first thumbnail image extracted by the icon generating unit from the first file of multimedia data, replace the source icon and the folder icon, representing the source device and the folder that include the first file of multimedia data, with the first thumbnail image, output a second file of multimedia data in response to a user selection of another one of the file icons, and update the graphic user interface by using as the generated icon a second thumbnail image extracted by the icon generating unit from the second file of multimedia data, and replace the source icon and the folder icon, representing the source device and the folder that include the second file of multimedia data with the second thumbnail image. display a plurality of source icons (31, 32, 33, 34) representing respective source devices; display a plurality of folder icons (35, 36, 37) respectively representing folders in response to a user selection of one of the source icons, wherein the selected source device includes the displayed folders, display a plurality of file icons (44, 45, 46) respectively representing files of multimedia data in response to a user selection of one of the folder icons, wherein the selected folder includes the plurality of files of multimedia data, output a first file of multimedia data in response to a user selection of the one of the file icons, use as the generated icon a first thumbnail image extracted by the icon generating unit from the first file of multimedia data, replace the source icon and the folder icon, representing the source device and the folder that include the first file of multimedia data, with the first thumbnail image, output a second file of multimedia data in response to a user selection of another one of the file icons, and update the graphic user interface by using as the generated icon a second thumbnail image extracted by the icon generating unit from the second file of multimedia data, and replace the source icon and the folder icon, representing the source device and the folder that include the second file of multimedia data with the second thumbnail image.