Phantom disk appearing in PowerExpand+ 7 USB Hub

My Windows computer keeps beeping and driving me a little nuts. I finally figured out it’s telling that there’s a new “Disk 1” with no media. Then the disk disappears, and reappears. If I plug a MicroSD card in, it does the same thing with that disk - disappearing and reappearing. Is this a hardware issue specific to my box? If so, how do I go about getting a replacement?