An information processing device including: a storage unit for storing a data file including readable content, and a control file including control information corresponding to the data file; and a data processing unit configured to use a filename conversion table, which stores filename conversion information, to convert the filename of a file stored in the storage unit into a virtual file system (VFS) name, to construct a VFS that includes storage data of a disc and storage data of the storage unit, and to perform a data reading process; wherein the data processing unit: compares the control information stored in the control file and data stored in the storage unit, and reads and/or updates the filename conversion table to reconcile the control information stored in the control file and the stored data in the storage unit.