The Tech Field Day events I organize generate a massive amount of HD video content, and moving half a terabyte or more of data is a real issue. We had been using luggable desktop drives from Western Digital and Seagate, but preferred a smaller, lighter, USB bus-powered portable solution. The Seagate Expansion Portable USB drive we bought this week packs an amazing 1 TB of capacity, but our experience with the product was mixed at best.