No, it's not an SD card. It will not fit in the USB ports, so I can't stick it in anywhere randomly! It looks much like a thumb drive: it has a rectangular metal casing, with a visible card if you look up the open end. It is not crushed. But it is just slightly flatter and wider than a normal thumb drive & doesn't have the little white piece you can often see in the end.
I'm taking it to work today. Maybe our IT guy will know what it is...if not, I'll take a photo if possible & post it.
I'm kind of glad someone didn't just get on here and say, "You idiot. It's an XYZ drive. Everyone's getting them these days."
I have a feeling it's a mistake; it came with a case that the USB part of the thumb drive should stick into and it doesn't fit. I wonder if it's in backwards? Has anyone ever seen the rear end of a thumb drive, the part that's usually stuck in whatever holder it comes with?
I may be trying to stick the rear end in my port...