Xiaomi Router 3G - USB Problem in 18.06.1

Not working as of 19.07.7. My device is Newifi D2 which uses the MT7621 chipset.

Some Team Group USB 3.0 flash drive works fine. Seagate external HDDs do not work. I have no choice but to use a USB 2.0 cable to force it to work in 2.0 mode.

Update 2021-09-10: works p̵e̵r̵f̵e̵c̵t̵l̵y on 20.02.0 now. Edit: the driver is USB3.0 but not UASP. Better than nothing though.