Patent ID: 7904811

Claim:
A file storage device, comprising: a first memory unit configured to store a table including permissible combinations of data formats and corresponding file formats; a second memory unit configured to store an information file in a first data format and a corresponding first file format; a receiving unit configured to receive information from a user terminal indicating a combination of a second data format and a corresponding second file format, wherein the information from the user terminal further indicates that the information file in the first data format and the first file format is to be converted to the second data format and second file format; a determination unit configured to determine whether the combination of the second data format and the second file format indicated by the information received from the user terminal is included in the table; a processing unit configured to, in response to a determination by the determination unit that the combination of the second data format and the second file format indicated by the information received from the user terminal is not included in the table, automatically change the combination of the second data format and the second file format to a permissible combination of a data format and a file format included in the table, thereby causing the user terminal to display the permissible combination of the data format and the file format; a data format conversion unit configured to, in response to a request from the user terminal, convert the information file in the first data format and the first file format into one combination of the second data format and the second file format if determined by the determination unit to be included in the table, and the permissible combination of file format and data format generated by the processing unit; and a delivery unit configured to deliver the information file converted by the data format conversion unit.