Applies to NFSv3 NFSv4.x Answer Adding files to a UNIX directory modifies the directory file, adding the associated inodes of the child files created. Thus the modified time is updated. Additional Inf...Applies to NFSv3 NFSv4.x Answer Adding files to a UNIX directory modifies the directory file, adding the associated inodes of the child files created. Thus the modified time is updated. Additional Information Clients have the ability to decide if/when mtime of a directory should be changed. See: rfc1813