> If lets say dirA and dirB both have subdirectories named 'a' > and both subdirectories have different modification times > do we just copy the the entire content of the subdir'a' of the latest modification time to the one with older mod_time or do we then compare those two 'a' subdirectories dirA/a and dirB/a the same as we do with just dirA and dirB? with their file modification times?