I store my lenses in two 100 liter dry cabinets like this one:
I plan to buy a third cabinet as I have many lenses that still do not fit in the two existing ones.
Whether you need a dry cabinet depends greatly on the humidity rate where you live. Whatever the humidity, my advice would be to always avoid storing lenses in cases, especially those leather or plastic cases that come with lenses. These cases are meant to protect the lenses in the bag when carrying them, but not for long term storage. Leather has a tendency to attract moisture and I have seen too many lenses ruined by fungus due to prolonged storage inside a tight case, despite a relatively low humidity rate in the storage building.
Cheers!
Abbazz