A communication apparatus is connected to a terminal apparatus via a network. The communication apparatus includes a storage that stores a document file and an HTML file of a user setting page. A file manager stores a storage period for the document file, determines whether or not the document file has been stored in the storage for the storage period, and deletes the document file when the document file has been stored in the storage for the storage period. A web server transmits, to the terminal apparatus, the HTML file of the user setting page, the user setting page configured so that a user at the terminal apparatus can request a change of the storage period. The web server further instructs the file manager to change the storage period, when the user requests the change of the storage period.