If you are using " test disk " software (" http://www.cgsecurity.org/wiki/TestDisk ") for recovering your formatted disk than you will need a file classifier cause it will recover Lot’s of unwanted files . You have to just modify the path of classifier code and you are done . Run it on Linux machine and it will classify almost 80 Gb Raw data in 2 to 3 Min which is impossible for gui search cut and past.