Hello! Malwarebytes wouldn't prevent a portable storage device such as your camera's SD card from "mounting" or loading in Windows and being seen under your external devices. I'd recommend having someone at our repair center look at that for you. Could be any number of things, especially with you unable to now remove it - maybe it was inserted upside down? We can definitely take a look and help in store, if you'd like!
Not familiar with this problem, sorry
Thanks! Your answer is awaiting moderation.