1. A mobile terminal, comprising: a touchscreen configured to receive a touch input and display a content; a sub-touch device configured to receive a touch & drag input; and a controller configured to: recognize the touch input received at the touchscreen and the sub-touch device, when the touch input is received via the touchscreen, control menu items associated with the content to be displayed on the touchscreen, and when the touch & drag input is received via the sub-touch device while one of menu items on the touchscreen is selected by the touch input received via the touchscreen, control at least one submenu item subordinated to the menu item selected by the touch input to be displayed on the touchscreen in response to the touch & drag input, wherein when the menu item selected by the touch input is related to a function to change a storing folder of the content, the at least one submenu item corresponds to at least one candidate folder to which the content is able to be moved, wherein when a secret folder is selected from among the at least one candidate folder, the controller is configured to move the content to the secret folder and stop displaying the content on the touchscreen after the movement, and wherein when a non-secret folder is selected from among the at least one candidate folder, the controller is configured to move the content to the non-secret folder and keep displaying the content on the touchscreen, wherein when both of another touch input on the touchscreen and another touch & drag input on the sub-touch device are detected simultaneously, the controller is further configured to change a submenu item in response to the another touch & drag input, the submenu item being subordinate to the menu item selected by the another touch input on the touchscreen, and wherein when one of the another touch input on the touchscreen or the another touch & drag input on the sub-touch device is released while the other is maintained, the controller is further configured to execute a command corresponding to the submenu item selected at the time of releasing the one of the another touch input or the another touch & drag input.