where i got concept how to recover folder and file?
99.999% not in public forums. File system guts, especially so drastically different creatures like FAT and NTFS, is too much subtle matter to be taught from such an uncertain source. I wonder, how would it be not apparent enough?

Sorry, there's no intention to offend or urge you to something like snarling at me back, but if I heard somebody asks questions of the kind in public forums (what gives me out a completely unprofessional approach) and then releases another "file recovery!!!" product in a half a year, I would do all my best to avoid the one.