The Speed of this NAS box is limited by the USB 2.0 connection.
The JMS567 Chip is USB3.1 but the connection to the Nanopi Neo2 is only USB 2.0, so you wont get faster than 40 MB/s.
(USB 3.0 SATA-Controller connected to USB 2.0) --> 40 MB/s
This is really slow
Better you use a
http://www.hardkernel.com/main/products/prdt_info.php?g_code=G150229074080
greetz