If all you need is standard USB 2.0 connectivity, the 500GB GoFlex comes pre-packaged with it, along with some spiffy backup software to sweeten the deal.
However, Seagate’s FreeAgent GoFlex Ultra-Portable hard drives might just change the status quo, as these devices don’t support any specific form of data transfer. Sure, it’s great that Western Digital’s USB-only My Passport for Mac ( ) is fast and relatively inexpensive, but most people need a device with a little more flexibility, like Iomega’s 500GB eGo Mac Edition ( ) and its FireWire 400 & 800 support. With most external hard drives, you can never really have too many ports.