Use the programs for do this:

-main2raw
to make a .pbn file with all files of phone
-SEFStool4
to convert .pbn file to .raw and the files will appear in a folder

procedure:
Example:
3 – In prompt type: “main2raw [name of the file .fbn]” (ex: (...)\backup\main2raw
k790_r6bc002.fbn)
4 – Wait finish, push enter to close and see that has been created a new file (ex:
K790_r6bc002.raw)
5 – Type: “sefstool4 [name of the file .raw]” (ex: (...)\backup\sefstool4 k790_r6bc002.raw)
6 – Wait finish, push enter and finished! You can close the program.
7 – A folder has been created, and inside of them we find other folders, the folders of phone like as it be in the phone.