It's supposed to be a home console first, and have the option to take it away if you want to. Also, as a hybrid, it should allow the NS to act as both, home console AND portable. Therefore meaning you can choose to have it used as a home console only and have the easier and cheaper option to attach an HDD, or use it as a portable and use SD cards instead. Whatever floats your boat.
What this is telling me is that it's not even a hybrid. There is no option but one. The one that caters only to the portable part, the SD cards.
So now I know this is really a portable that can be played as a home console, not the other way around.
Got the message.