I use this box for storage.
I bought it at Biltema, a swedish version of Walmart, for 99 Swedish crowns (around 13 USD, 11 EUR). It's originally made for storing screws, bolts, bricks etc. The cards fit perfectly in the boxes, and you can easily fit all dungeon cards and the adventure cards from the dungeon expansion in one box (to give you an idea of the size). The are nine boxes on each side and I have all cards on one side and all tokens on the other side. The boxes are easily removed from the black storage part and can be moved individually so I keep all tokens in the boxes when we play. although I've to remove cards and place them in piles on the table. I know that the picture ain't very good but if you're interested I can provide pictures when we have our next session.
Anyway, I have my game stored away in one big box (boards and rule books), 3 small boxes (1 for large cards; characters, quests, frog, reaper card etc, 1 for character minis and 1 for painted minis) and of course this storage box. Works perfectly and is easily transported.