A communication apparatus is connected to a terminal apparatus via a network. The communication apparatus includes a memory that stores image data and a storage period of the image data and a checker that determines whether a storage time of the image data exceeds the storage period time. A deleter deletes image data based on a determination by the checker section and a server transmits an instruction for changing the storage period to the terminal apparatus in accordance with a request by the terminal apparatus, wherein the storage period is changeable from the terminal apparatus.