MMCFTP is a new file transfer protocol that enables long distance high-speed data transfer, and it achieved 150 Gbps data transfer between Tokyo and Salt Lake City in SC16. In TNC17, we will demonstrate data transfer between London and Tokyo at the same speed. By analyzing results in SC16, we found that system memory bandwidth restricts data transfer speed. In this poster, we explain techniques added to MMCFTP after SC16 in order to reduce use of memory bandwidth, and present effects.