I'm trying to connect a usb 3 card reader but if I plug into a usb 3 port on the server the client i connect gets "Unknown USB Device (Invalid Device Descriptor)" in device manager. Plugging in through a usb 2 extension solves the issue but should i not get better speeds if I can get it to work on USB 3? I have tried other usb 3 devices like a usb key and get the same result.
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No, you cant use usb 3.0 from windows to windows.
You need to use a linux server with a recent kernel and a windows 10 client to get usb 3.0 throughput (approx 40Megabytes/sec)