Yep. Was in before pressing eject. 1st USB port on front (just like $SystemUpdate).Slims need usb connected before it glitches or it doesnt see it, maybe that?
USB stick is one I usually use as it has led which shows activity (which it did as it was flashing) but didn't get a prompt of update (or press A to cancel) for some reason.
It's a Corona 4gb if that helps any?