The invention manages the download of print resource data, which is used during print processing, to a plurality of printing apparatuses in a network system in which the plurality of printing apparatuses and a server are connected. An identifier for g the print resource data to be downloaded is input, and downloadable printing apparatuses are determined in accordance with a type of a storage device attached to each of the plurality of printing apparatuses. The print resource data corresponding to the input identifier is downloaded to the determined printing apparatuses. When the data processing apparatus holds the print resource data corresponding to the identifier, the held print resource data is downloaded, and when the data processing apparatus does not hold the print resource data corresponding to the identifier, the print resource data is acquired from the server and downloaded. A server flag set to the downloaded print resource data is read, and it is determined that the downloaded print resource data should be transferred to the server when the server flag indicates that the downloaded print resource data should be transferred to said server, and it is determined determining that the downloaded print resource data should not be transferred to said server when the server flag indicates that the downloaded print resource data should not be transferred to said server.