I have 2 Win10 PCs, both with Wi-Fi 6 AX201 cards installed. Both connected to an AT&T BGW320-500 modem with 1Gbps fiber connection. When I do a speed test on either PC, it returns 970 Mbps or so up and down, but when I transfer a 1Gig file from one PC to the other over the network, 90% of the...