Not sure why You got such low transfer speeds so I just tested EXT4 and NTFS read and write performance on FreeBSD.

Its about:

-> 800+/250+ MB/s for NTFS

-> 200+/128+ MB/s for EXT4

... and its on 8 years old ThinkPad T480 laptop with CPU speed set/limited to 1.4GHz.

Details:

- https://pbs.twimg.com/media/G_mlqaTWEAAxyRU?format=jpg&name=...

- https://pbs.twimg.com/media/G_mlqaMWMAMbq2q?format=jpg&name=...