Files
[ID_FILE  ]<=\ <===============\
[NAME_FILE]  |                 |
[ID_FATHER]__|                 |
[FILE_TYPE]___________         |
[ID_CD    ]__         |        |
             |        |        |
CDs          |        |        |
[ID_CD    ]<=/        |        |
[MORE_SHIT]           |        |
                      |        |
File Type             |        |
[ID_TYPE  ]<=========/<=\      |
[FILE_TYPE]             |      |
                        |      |
                        |      |
Each type has a         |      |
table with his own      |      |
attrs                   |      |
[ID       ]             |      |
[ID_TYPE  ]_____________|      |
[ID_FILE  ]____________________|
[MORE_SHIT]