My saying sounds like compression. probably it is.
the issue is that, for instance, make 5 files (located in C:\) to 'abc.dat' file in C:\abc\.(however, don't modify, move, or delete those 5 files) and then I create a file named 'X' in C;\.
Now, in C:\, there are 6 files. I will compare 6files with the file 'abc.dat';
If the result of comparision is same, do nothing.
Otherwise, differnt file(in this case, 'X' file) will be moved into
C:\New\.