in the following detailed description , reference is made to the accompanying drawing figures which form a part hereof , and which show by way of illustration specific embodiments of the invention . it is to be understood by those of ordinary skill in this technological field that other embodiments may be utilized , and structural , electrical , as well as procedural changes may be made without departing from the scope of the present invention . wherever possible , the same reference numbers will be used throughout the drawings to refer to the same or similar parts . fig1 is a block diagram illustrating an implementation of architecture of the mobile terminal 10 according to an embodiment of the present invention . as shown in fig1 , the mobile terminal 10 may be a mobile communication device . the mobile terminal 10 includes a transceiving unit 100 , a memory unit 110 , an input unit 120 , a display unit 130 , and a controller 140 . the respective elements may be connected using a bus 150 . the transceiving unit 100 communicates with a base station via an antenna ( ant ) and receives various files , including music , image , and video , via the antenna ( ant ). the memory unit 110 may include a flash memory , a random access memory ( ram ), or an electrically erasable programmable read only memory ( eeprom ). the memory unit 110 stores a predetermined program for controlling a general operation of the mobile communication terminal 10 . the memory unit 110 stores a plurality of files , including music , image , and video . also , the memory unit 110 stores information on a specific position that is set to correspond to a specific input signal of the input unit 120 . the input unit 120 includes numeral keys and a variety of function keys . the input unit 120 selects a list of files . the files may be selected from all or a specific category of files stored in the memory unit 110 . the input unit 120 selects any one or more file and generates a specific input signal for the selected file . the display unit 130 displays each variety of information signal received from the transceiving unit 100 . the display unit 130 may display a list of files of all or a specific category selected through the input unit 120 . the controller 140 includes a mobile station modem ( msm ) and controls general input / output of the mobile terminal 10 . in one embodiment of the present invention , where one or more files are selected through the input unit 120 from among the list of files displayed on the display unit 130 , upon generation of a specific input signal , the controller 140 controls and adds the selected file ( s ) to a specific position that corresponds to the specific input signal . fig2 is a flowchart illustrating an implementation of a method for adding files using the mobile terminal 10 . fig3 is a diagram illustrating an example of setting a specific position corresponding to a specific input signal . as shown in fig2 , the file addition method includes setting a specific position corresponding to a specific input signal ( step 200 ), displaying a list of files ( step 210 ), selecting a file from the displayed file list ( step 220 ), checking whether a specific input signal for the selected file is generated ( step 230 ), and adding the selected file to a specific position that corresponds to a specific input signal ( step 240 ). if the input unit 120 is a key type , as shown in fig3 , a menu for “ setting position for file addition ” is selected through the input unit 120 . accordingly , the controller 140 displays a name of a specific position 300 for file addition on the display unit 130 . the controller 140 controls the display unit 130 such that a specific input 305 corresponding to a specific position 300 may be set through the input unit 120 . the term “ specific position ” refers to a position at which selected files may be added . for example , a specific position may be a playlist to which a file is added . a playlist represents a list for grouping and playing a plurality of music files stored in the memory unit 110 . accordingly , playlists 1 , 2 , 3 , and 4 each may be formed such that music files may be grouped and played according to a user &# 39 ; s desire . for example , a user may select all music which is good for exercising , as music files stored in “ playlist 1 ”. after a user associates certain music files with “ playlist 1 ,” the display unit 130 displays only a list of music files corresponding to the “ playlist 1 ” when “ playlist 1 ” is selected . the specific input 305 may be set through the input unit 120 to add files to a playlist . if desired , a specific input 305 may be input using numeral keys when the input unit 120 is a keypad . a specific input 305 of the input unit 120 that serves to associate a file with “ playlist 1 ” may be set as a numeral key “ 1 ”. a specific input 305 of the input unit 120 that serves to associate a file with “ playlist 2 ” may be set as a numeral key “ 2 ”. a specific input 305 of the input unit 120 that serves to associate a file with “ playlist 3 ” may be set as a numeral key “ 3 ”. a specific input 305 of the input unit 120 that serves to associate a file with “ playlist 4 ” may be set as a numeral key “ 4 ”. the same principle applies to setting the specific input 305 corresponding to the specific position 300 and setting the specific position 300 corresponding to the specific input 305 . fig4 a to 4c are diagrams illustrating examples of adding files to a playlist in response to a specific input signal . as shown in fig4 a , a menu of “ all music ” is selected through input unit 120 . the controller 140 displays a list all music files stored in the memory unit 110 on the display unit 130 ( step 210 ). fig4 a illustrates , selecting a music file named “ hello .” files are selected by moving a selection bar 310 and selecting a file on which the selection bar 310 is positioned . the controller 140 checks whether a specific input signal is generated ( step 230 ). as shown in fig4 b , when a numeral key “ 3 ” of the input unit 120 is selected , the controller 140 adds the “ hello ” music file to “ playlist 3 ” ( step 240 ). accordingly , as shown in fig4 c , the controller 140 has added the “ hello ” music file to “ playlist 3 ”. fig5 is a diagram illustrating an example of selectively adding files to a playlist . a numeral key “ 3 ” is selected through the input unit 120 when the “ hello ” file is selected as shown in fig4 a . as shown in fig5 , the controller 140 displays a message window 315 with a message of “ add ‘ hello ’ to ‘ playlist 3 ’?” on the display unit 130 . if the user intends to add the music file to the corresponding position , “ okay ” is selected . otherwise , “ cancel ” is selected . in the current embodiment of the present invention , when specific music files are selected , a position to which the selected music files may be added is displayed . an example is illustrated in fig6 a to 6c . fig6 a to 6c are diagrams illustrating examples of displaying an addition position guide at one side of selected file . as shown in fig6 a , the “ hello ” file is selected through the input unit 120 when all music files are displayed on the display unit 130 . accordingly , the controller 140 displays a name of a specific position 300 for file addition and an addition position guide 317 representing specific inputs 305 of the input unit 120 , each specific input corresponding to a name of a specific position 300 . the addition position guide 317 may be formed in a position adjacent or close to a selection bar 310 . as shown in fig6 b , the controller 140 may display the addition position guide 317 at one side of the display unit 130 . in an alternate embodiment , as shown in fig6 c , the controller 140 may display the addition position guide 317 on the display unit 130 in a pop - up window form . the addition position guide 317 may be configured according to a user &# 39 ; s setting . the above implementation is a description of selecting a specific file , selecting a specific numeral key of the input unit 120 , and inputting a specific input . however , it is not intended to limit the scope of the present invention . in other words , a specific input may be a non - preset input . an example of a non - present input is illustrated in fig7 a to 7d . fig7 a to 7d are diagrams illustrating examples of creating a playlist and changing a name of a playlist . as shown in fig7 a , the “ hello ” file may be selected through the input unit 120 when all music files are displayed on the display unit 130 . then , a numeral key “ 5 ” is selected through the input unit 120 . for example , as illustrated in fig7 a , numeral key “ 5 ” is selected . if numeral key “ 5 ” is not associated with a playlist , the controller 140 will create a new playlist . therefore , as shown in fig7 b , the controller 140 displays a message window 315 with a message of “ create playlist 5 ?” on the display unit 130 . as shown in fig7 c , the controller 140 displays a message window 315 with a message of creating a playlist on the display unit 130 if “ yes ” is selected through the input unit 120 . the controller creates and names “ playlist 5 ” and adds the selected files to the created playlist . as shown in fig7 d , the controller 140 controls and changes the playlist name if “ name change ” is selected through the input unit 120 in message window 315 of fig7 b . the above implementation is a description of selecting specific files through the input unit 120 and moving the selected specific file to a specific position when all music files are displayed on the display unit 130 . however , it is not intended to limit the scope of the present invention . fig8 a and 8b are diagrams illustrating examples of adding contents between playlists . as shown in fig8 a , the display unit 130 displays a list of music files added to “ playlist 3 ”. a numeral key “ 2 ” is selected through the input unit 120 when music content “ ost 01 ” is selected . as shown in fig8 b , the controller 140 adds “ ost 01 ”, which has already been added to “ playlist 3 ”, to “ playlist 2 ”. after adding “ ost 01 ” to “ playlist 2 ”, the controller 140 may delete “ ost 01 ” from “ playlist 3 ”. this setting may be set by a user . fig9 a and 9b are diagrams illustrating examples of displaying an indicator indicating a position to which respective files are currently added . as shown in fig9 a , the controller 140 may display an indicator 320 indicating a position to which respective music files are currently added at one side of all music files displayed on the display unit 130 . for example , the controller 140 displays an indicator 320 “ 1 ” for indicating that music files of “ like rain like music ” and “ love ” are added to “ playlist 1 ”. the controller 140 displays an indicator 320 “ 2 ” for indicating that music files of “ small talk ” and “ black glass ” are added to “ playlist 2 ”. the controller 140 also displays an indicator 320 “ 3 ” for indicating that music files of “ hello ” and “ shout me ” are added to “ playlist 3 ”. the controller 140 further displays an indicator 320 “ 4 ” for indicating that the music file of “ only wind only wind ” is added to “ playlist 4 .” as shown in fig9 b , the controller 140 may display all positions for music files added to two or more playlists . for example , the controller 140 displays all positions where the music file of “ hello ” is added to playlists “ 3 ” and “ 5 ”. the above implementations are a description of an embodiment when a file is added to a specific position . in an alternate embodiment a plurality of files may be added to a playlist . fig1 a and 10b are diagrams illustrating examples of adding a plurality of selected files to a playlist in response to a specific input signal . as shown in fig1 a , a plurality of files are selected through the input unit 120 when all music files are displayed on the display unit 130 . as shown in fig1 b , if numeral key “ 2 ” of the input unit 120 is selected , the controller 140 adds the plurality of selected files to “ playlist 2 ” that corresponds to the numeral key “ 2 ”. adding files to a playlist refers to adding a name of a file to the playlist without changing a storage position of the file . however , in an alternate embodiment , a storage position of files may be changed when a file is added to a playlist . fig1 a and 11b are diagrams illustrating examples of changing a storage position of files in response to a specific input signal . as shown in fig1 a , a menu for “ setting position for contents addition ” is selected through the input unit 120 . accordingly , the controller 140 displays a name of a specific position 300 for file addition on the display unit 130 . the controller 140 controls and sets a specific input 305 of the input unit 120 corresponding to the name of the specific position 300 . the specific position 300 may be “ 1 . background music folder ,” “ 2 . internal memory ,” or “ 3 . external memory .” a method of setting the specific input 305 using the input unit 120 is the same as the above description of fig3 . after the specific position 300 is set , the “ hello ” music file may be selected through the input unit 120 as shown in fig4 a . after selecting the file , if numeral key “ 3 ” of the input unit 120 is selected , the controller 140 adds the music file of “ hello ” to an external memory that is set to correspond to the numeral key “ 3 ”. in one embodiment , adding the “ hello ” music file also deletes the music file from an original storage position and added to the external memory . in an alternate embodiment , the “ hello ” music file may be copied to the external memory such that an original storage position is maintained . as described above in fig9 a , the controller 140 may display a position at which respective contents are currently stored . the embodiments described above are examples of when a specific position that corresponds to a specific input of the input unit 120 is a playlist or a storage position . however , it is not intended to limit the scope of the present invention . fig1 a and 12b are diagrams illustrating examples of changing a display position of files by a specific input . as shown in fig1 a , a list of music files added to “ playlist 3 ” is displayed on the display unit 130 . in the example , when “ 6 . ost 02 ” is selected , numeral key “ 1 ” of the input unit 120 is pressed . as shown in fig1 b , the controller 140 may add “ 6 . ost 02 ” as “ 1 . ost 02 ,” which corresponds to the first music file of “ playlist 3 .” the embodiments described above are examples where the content of a file is music . however , it is not intended to limit the scope of the present invention . fig1 a to 13c are diagrams illustrating examples of setting a specific position corresponding to a specific input signal in the case of image file . as shown in fig1 a , a file may be an image such as a photograph or a picture . the image file may be added to a specific position in the same manner as with the above - described music contents . in detail , as described with respect to fig3 a , a menu for “ setting position for file addition ” is selected through the input unit 120 . accordingly , the controller 140 displays a name of a specific position 300 for file addition on the display unit 130 . the controller 140 controls and sets a specific input 305 of the input unit 120 corresponding to the name of the specific position 300 . the specific position 300 may be a folder such as “ 1 . my photograph folder ”, “ 2 . family photograph folder ”, “ 3 . friend photograph folder ”, or “ 4 . other photograph folders ”. “ folder ” refers to a group of one or more image files , similar to the playlist described above . accordingly , a specific input 305 of the input unit 120 that serves to add contents to a position of “ 1 . my photograph folder ” is set as numeral key “ 1 ”. a specific input 305 of the input unit 120 that serves to add files to a position of “ 2 . family photograph folder ” is set as numeral key “ 2 ”. a specific input 305 of the input unit 120 that serves to add files to a position of “ 3 . friend photograph folder ” is set as numeral key “ 3 ”. a specific input 305 of the input unit 120 serving to add files to a position of “ 4 . other photograph folders ” is set as numeral key “ 4 ”. as shown in fig1 b , a list of all image files stored in the memory unit 110 is displayed on the display unit 130 and an image file , “ at home . jpg ,” is selected , when the specific position corresponding to the specific input is set . after selecting the image file , as shown in fig1 c , if numeral key “ 1 ” is selected through the input unit 120 , the controller 140 adds the image file corresponding to the numeral key “ 1 ” to the “ my photograph folder .” additionally , as in the above - described music files , image files can be added to a specific position . the specific input set to a numeral key of the input unit 120 in the above - described examples may be selected for a predetermined time . for example , when a numeral key is selected for “ one second ” a numeral key corresponding to a specific menu is input and if the numeral key is selected for “ two or more seconds ,” the numeral key may correspond to adding files to a specific position . fig1 a to 14c are diagrams illustrating examples of adding files to a specific position using a touch type input unit . as shown in fig1 a , the input unit 120 may be a touch type input device such as a touch screen 122 . accordingly , if numeral “ 3 ” is input on the touch screen 122 when the “ hello ” music file is selected , the controller 140 may add “ hello ” to a position set to correspond to numeral “ 3 ”. as shown in fig1 b , if numeral “ 3 ” is input to a separate touch input region 330 provided on a touch screen when the “ hello ” music file is selected , the controller 140 adds “ hello ” to a position set to correspond to the numeral “ 3 ”. as shown in fig1 c , the controller 140 can display an addition position guide 317 at one side of a touch screen when the music contents of “ hello ” are selected . thus , if the music contents of “ hello ” are dragged and dropped to a numeral “ 3 ” of the addition position guide 317 with being touched , the controller 140 adds the music contents of “ hello ” to a position set to correspond to the numeral “ 3 ”. fig1 is a diagram illustrating an example of adding files to a specific position using a rotary type input unit . as shown in fig1 , the input unit 120 may be a rotary input device such as a jog disk 124 . accordingly , if jog disk 124 rotates three times in the direction of “ b ” in a state where the “ hello ” music file is selected , the controller 140 may add “ hello ” to a position set to correspond to the numeral “ 3 ”. if the jog disk 124 revolves in the direction of “ a ”, the next music file , “ small talk ,” may be selected . alternately , in case where the jog disk 124 rotates three times in the direction of “ a ” or “ b ” and the third rotation is made during a time longer by a predetermined time compared to the respective previous first and second rotations , the controller 140 adds the music file of “ hello ” to the position set to correspond to the numeral “ 3 ”. this setting may be changed by the user . fig1 is a diagram illustrating an example of adding files to a specific position using a stick type input unit . as shown in fig1 , the input unit 120 may be a stick type input device such as a jog stick 126 . if the jog stick 126 rotates three times to the right when the “ hello ” music file is selected , the controller 140 adds “ hello ” to a position set to correspond to “ three times ” in the right direction . the direction of movement of the jog stick 126 may be set and changed . the stick type input device may be any stick type input device that is movable in several directions , such as in two directions or five directions as well as the four directions shown in fig1 . in the embodiments discussed above , files are added to a playlist or a storage position . however , it is not intended to limit the scope of the present invention . in an alternate embodiment of the present invention , files may be added to a playlist while simultaneously changing a storage position . in the embodiments discussed above , specific selected files , such as an image or a music file , may be played . even when a plurality of specific contents are selected , any one or more of the specific contents can be played . the above embodiments are a description of a method for adding files in a mobile terminal 10 . however , the present invention may also be applied to other types of electronic devices . examples of such devices include a portable device , a digital broadcast receiving terminal , an mp3 player , a personal digital assistant ( pda ), and a portable multimedia player ( pmp ). additionally , music files may be provided in any electronic equipment including a mobile terminal 10 which may produce sound . furthermore , the present invention is applicable to all types of files available for electronic equipment . examples of other types of files to which the present invention is applicable are a moving picture , a game , or a document in addition to music and image files . as described above , the present invention increases user convenience because specific contents are promptly and rapidly added to a set position . the foregoing embodiments and advantages are merely exemplary and are not to be construed as limiting the present invention . the present teaching can be readily applied to other types of apparatuses and processes . the description of the present invention is intended to be illustrative , and not to limit the scope of the claims . many alternatives , modifications , and variations will be apparent to those skilled in the art .