My Steinberg ur824 is causing my SSD to crash

First i would like to say that I brought this unit used from the internet. I do not know if i have the stock USB cable but the Power Suply seem like the good one.


Each time i reset my computer and the usb cable is plug in from the ur824, my SSD is crash

But when i unplug my USB cable from my device. It all goes back to normal.

Another thing , when i unplug the usb cable from my computer and put the power at off from the ur824 , i can hear a buzzing sound comming from my speakers. the sound disapear when i touch the computer case with the tip of the usb cable.

I would like to know what i have to do to remove the sound and to solve my short problem from my computer.

Thanks in advance