| 摘要 |
PROBLEM TO BE SOLVED: To easily select a desired file (data set) among plural files respectively provided in plural directories (storage areas). SOLUTION: When a desired file is selected among plural files provided in plural directories of various storage media in an external storage device, plural files included in a selected directory are shown on an indicator 23 when the directory is selected by a directory selection operation element group 24. Plural file selection operation elements provided near the indicator 23 are provided at positions respectively corresponding to plural displayed files, and when a file selection operation element 25 corresponding to one desired file among plural files shown on the indicator 23 is operated, the one desired file is selected. |
