When a user creates a file of a document by allowing a scanner to read the document, a folder for filing is automatically created, dispensing with the need for the user to create the folder. Mail software has a folder structure that includes a folder in which to store received data. A folder structure analysis unit obtains information on the mail software folder structure, or the data management structure, and analyzes the information. A folder structure comparison/creation unit creates the analyzed folder structure directly as a folder structure in the file system so as to perform file management. This allows the user to perform filing processing for the same folder structure as the folder structure in the mail software which the user is used to use, thus enabling the user to store a file in an appropriate folder without being confused.