In a data transmission apparatus, an input unit inputs data, and a transmission unit transmits the inputted data to a destination. A discrimination unit discriminates an attribute of the inputted data, and a storage unit stores the inputted data to a predetermined memory. A control unit controls a transmission operation of the transmission unit in accordance with a discrimination result obtained by the discrimination unit, such that the transmission unit transmits to the destination the inputted data or information indicating a storage location used by the storage unit.