Abstract: The invention is directed to a device and a method for loading files onto a remote application which uses a standard protocol of the http type while making it possible to track the progress of said loading. For this purpose, there is provided a second port which enables the measurement, performed on the server where the application is located, of the progress to be displayed. The invention is particularly useful for operating and maintaining applications onboard an aircraft, for which the standards prescribed by airlines require progress tracking for transfers in both directions.