USB 2.0 is most popular due to wide compatibility but transfer speeds are slow in today's standard. Other options like FireWire, eSATA and the recently introduced USB 3.0 offer much more bandwidth but of course many computers don't support these various interfaces. Until now, the tradeoff has been speed versus compatibility. But with Seagate's new FreeAgent GoFlex portable hard drive, you can get the best of both worlds. The GoFlex drive ships with a standard USB 2.0 interface but what makes this drive unique is the ability to remove the interface and replace it with a complete different interface.