Why doesn Magellan get with it and ship units directly with USB?
A large market for these receivers is in navigational systems that conform to the NMEA 0183 standard and that spec uses multidrop serial, not USB. While there isn’t a USB connector on any current Magellan, the pain of large transfers can be offset by placing an SD card on a USB card reader. The new (early Q2, 2005) Explorist 300, 400, and 500 units have integral USB.