The router recognizes an internal USB 3.0 hub (5000M):

Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci-mtk/1p, 5000M

Is this with the USB drive plugged in? If not, try again with it plugged in to see if a new entry for it shows up.

If you see a new entry, try running in SSH:

block detect