I've read the threads about finding directory sizes using File::Find and so on adding up all files sizes recursively... Counting the total dirsizes when the dirs grows larger (500GB) becomes a very time demanding process. Time it won't take if I just enter Windows Explorer to check the dir sizes manually. Therefor, shouldn't it be likely to believe that the size of each dir is saved somewhere, to just pickup without needing to recalculate the size? Someone mentioned that using a Win32 API call could be a way, unfortunately I have no idea of how to do that... Someone of you do? Personally I'm using WinXP OS.