A terminal apparatus includes: a communication interface that acquires data output from a data output apparatus and supplies power to the data output apparatus; a storage that writes the data to a medium; a controller that controls the storage; a power supply that supplies power to the storage; and a power receiver that receives power from an external power source and supplies power to the communication interface and the power supply. In response to detecting a power outage and/or a voltage drop of the external power source, the controller controls the communication interface to stop supplying power to the data output apparatus.