Hello, thank you for reaching out to Microsoft Q&A.
Could you please try reinstalling the USB Hub drivers from the device manager and see if it helps?
- Disconnect your external USB drive from your device.
- Go to Device Manager > Expand the arrow next to "Universal Serial Bus Controllers".
- Right-click your USB driver (USB 3.0), usually it will be named as 'USB Type A with 3.0 Port' or "USB 3.0 Root Hub". Select Uninstall device, select the Attempt to remove the driver for this device check box, and then select Uninstall.
- Restart your computer.
Plug in your USB Flash drive to the USB 3.0 port and check if it is detected as a 'Removable device' in the Media Creation tool.
If not, clean your USB drive. Open Command Prompt as Administrator, execute these commands one by one below, and click Enter.
diskpart
list disk
select disk X
clean
create partition primary
format fs=fat32 quick
assign
exit
Note - Replace X with the drive letter.
Run the Media creation tool as Administrator, see if the USB removable plugged into the 3.0 port works.
If not, the problem might be with the USB drive. You can try a different USB drive, or if a flash drive is urgently needed, you can try a different USB port and create the installation media.
Let me know if you still need more help.