| 摘要 |
PROBLEM TO BE SOLVED: To easily refer to the same data from a plurality of files by managing data being recording in a storage medium, further managing one portion of the data, further managing data that is formed by collecting at least one data in the above, and further managing the relationship between the data being recording in the storage medium and one portion of the data. SOLUTION: The two master files of master files 1 and 2 are recorded and a file that is recognized as a file by a user is managed as a shared file. The master file 1 is referred to from a shared file and A and B. The shared file is composed by a shared element, the shared file and A are composed by a shared element 3 ranging from a logic sector (a) to (b), and the shared file B is composed of a shared element 1 ranging from the logic sector (a) to (b) and a shared element 2 ranging from the logic sector (c) to (d). The master file 2 is referred to only from a shared file C that is composed by a shared element 4.
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