Seems like ntfs-3g has limit for write speed = 30 MB/s, when the same SSD disk (samsung 860 EVO 1 TB connected via USB 3.0 lower port - closer to the board) with ext4 filesystem gives full Ethernet write speed 115 MB/s.
Linux rock 4.4.154-95-rockchip-gd2ab1f26e1b3 #1 SMP Mon Oct 21 06:42:35 UTC 2019 aarch64 aarch64 aarch64 GNU/Linux = Ubuntu 18.04.3 LTS