Duplicate files manager

  Duplicate files manager (DFM) find out duplicate files and expand disk space . You could find files with same content , same file name or same size . And compare two folders , find out same files between these two groups . DFM use some compare arithmethic to scan duplciate files , it could scan faster , or scan using less memory. After scan finish , I could generate a report of your files , let you know how much free space you could get .