A method for managing a file information system of a mobile terminal by using a client device, the file information system comprising applications, comprising: running, by the mobile terminal, an application in the foreground such that its execution screen is displayed on a display of the mobile terminal and running one or more other applications in the background such that their execution screens are not displayed on said display of the mobile terminal; and comprising the following actions while maintaining said execution screen of the application running in the foreground on the display of the mobile terminal; establishing a near field communication channel between the client device and the mobile terminal; copying (S415; S442)) the file information system from the mobile terminal to the client device; allowing a user, at the client device, to select an application from the received file information system; allowing a user, at the client device, to edit the file information system by means of said application selected in the file information system; transmitting from the client device to the mobile terminal a file information lock signal and locking, by the mobile terminal, the file information system on the mobile terminal for preventing the mobile terminal and the client device from editing the file information system simultaneously; receiving an edit complete signal at the client device and transmitting a file information system unlock signal from the client device to the mobile terminal, upon which the mobile terminal unlocks the file information system such that it can be edited; transmitting from the client device to the mobile terminal the edited file information system; and updating the file information system stored in the mobile terminal with the edited file information system. running, by the mobile terminal, an application in the foreground such that its execution screen is displayed on a display of the mobile terminal and running one or more other applications in the background such that their execution screens are not displayed on said display of the mobile terminal; and comprising the following actions while maintaining said execution screen of the application running in the foreground on the display of the mobile terminal; establishing a near field communication channel between the client device and the mobile terminal; copying (S415; S442)) the file information system from the mobile terminal to the client device; allowing a user, at the client device, to select an application from the received file information system; allowing a user, at the client device, to edit the file information system by means of said application selected in the file information system; transmitting from the client device to the mobile terminal a file information lock signal and locking, by the mobile terminal, the file information system on the mobile terminal for preventing the mobile terminal and the client device from editing the file information system simultaneously; receiving an edit complete signal at the client device and transmitting a file information system unlock signal from the client device to the mobile terminal, upon which the mobile terminal unlocks the file information system such that it can be edited; transmitting from the client device to the mobile terminal the edited file information system; and updating the file information system stored in the mobile terminal with the edited file information system.