| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that a user cannot manage all the huge amount of data recorded in an information storage device.SOLUTION: The information storage device includes a function that allows a user to easily acquire/manage all the data recorded in the information storage device by managing an operation added to the data recorded in the information storage device by the information storage device. Specifically, the information storage device includes: a unique ID addition means adding a unique ID to an electronic file when creating a new electronic file in the information storage device; a file management information creation means creating file management information for managing the operation added to the electronic file having the unique ID; and an operation history recording means recording an operation history in the file management information of the electronic file every time the operation is added to the electronic file having the unique ID. |
