Yes, it's a desk fan.
http://shop.trendy.nikkeibp.co.jp/item_info/20842300011007.html
You'd think they would have at least shopped "ヤマゼン 卓上冷風扇" out, or put something more convincing in its place.
EDIT: Oh yeah, if there's going the be a storage solution, it'll most likely be support for SDHC cards with a proprietary Nintendo filesystem. External storage solutions just don't seem like Nintendo's style.
WHERE IS MY KORORINPA 3