I've been charged this "SMB Hardware Purchase" for the last 3 months. It was never part of my original invoice or anything, I've been on hold for the last 2 hours and trying to get someone to chat with. I need these charges reversed.
I'd suggest waiting until later in the week, as they are currently overwhelmed with the calls about the 10GB for $60 offer.
I was just charged the same thing. Did you ever find out what it was for?
SMB stands for “Small Business”, basically.