DATA STRUCTURE PRODUCTION METHOD AND BACKUP DEVICE

摘要

There is provided a data structure production method for producing a multilevel directory structure in a backup device. The multilevel directory structure includes target data having at least one of video data and audio data. The data structure production method includes producing a first directory that establishes a first directory hierarchy, producing at least one second directory that establishes a second directory hierarchy lower than the first directory hierarchy wherein the target data is stored in the at least one second directory, and storing the at least one second directory in the first directory provided the first directory is less than or equal to a predetermined size.