Not good after all.
Doing up/download test to the NAS shows a steady 21,4 MiB/s.
That reminds me of USB 2 speed.
dmesg shows:
[ +0,029984] usb 2-2: New USB device found, idVendor=0bda, idProduct=0411, bcdDevice= 1.33
[ +0,000007] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ +0,000004] usb 2-2: Product: 4-Port USB 3.0 Hub
[ +0,000003] usb 2-2: Manufacturer: Generic
[ +0,010187] hub 2-2:1.0: USB hub found
[ +0,001472] hub 2-2:1.0: 4 ports detected
[ +0,101132] usb 1-2: new high-speed USB device number 8 using xhci_hcd
[ +0,158943] usb 1-2: New USB device found, idVendor=0bda, idProduct=5411, bcdDevice= 1.33
[ +0,000009] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ +0,000006] usb 1-2: Product: 4-Port USB 2.0 Hub
[ +0,000004] usb 1-2: Manufacturer: Generic
[ +0,002186] hub 1-2:1.0: USB hub found
[ +0,001133] hub 1-2:1.0: 4 ports detected
[ +0,064430] usb 2-2.4: new SuperSpeed Gen 1 USB device number 9 using xhci_hcd
[ +0,020396] usb 2-2.4: New USB device found, idVendor=0bda, idProduct=8153, bcdDevice=30.00
[ +0,000006] usb 2-2.4: New USB device strings: Mfr=1, Product=2, SerialNumber=6
[ +0,000004] usb 2-2.4: Product: USB 10/100/1000 LAN
[ +0,000003] usb 2-2.4: Manufacturer: Realtek
[ +0,000003] usb 2-2.4: SerialNumber: 000001000000
[ +0,076539] usb 2-2.4: reset SuperSpeed Gen 1 USB device number 9 using xhci_hcd
[ +0,039184] r8152 2-2.4:1.0: load rtl8153a-3 v2 02/07/20 successfully
[ +0,027627] r8152 2-2.4:1.0 eth0: v1.11.11
[ +0,046870] r8152 2-2.4:1.0 enp0s20f0u2u4: renamed from eth0
Anyone any idea how to get it to USB 3?
Different USB 3 port makes no difference.
It negotiates 1 Gb/s.
Thanks.