Slow USB speeds are often caused by using USB 2.0 ports, bad hubs, overheating drives, or improper formatting like FAT32 ...
Use TeraCopy to get a faster file transfer speed.
I have two Win 10 PCs. One is connected by cable to my router (Nest Wifi), the other is connected over 5GHz Wi-Fi (802.11ac). Windows lists the respective link speeds as 1000 Mbps and 866 Mbps ...