You don't need author Nick Hornby to tell you how special a mixtape can be. The beauty of making a mixtape is how customized it can be to the person it's intended for. But in the digital age, cassettes are no longer the preferred medium. Bring back the special feeling of filling out the track listing with this 64MB USB drive that fits into a case that looks like a cassette and stores about an hour of music. The drive costs $19.