what's better for storing data dvd discs envelopes or jewel cases? Which is less likely to scratch the dvd? witch is better for longevity? At walmart they sell cd jewel cases for pretty cheap, but the box make no mention of dvd discs. Would it be a good idea to put dvd discs into these jewel cases? dvd discs and cd discs are exactly the same size and it should not make a deiffance right?