[Errant]

The Goflex is a great drive when portability is important. I've got one I'm shipping out west with a ton of family photos to a family member now.

The WD My Book is better for use as a Network File Server device, IMO, primarily because of the software.

[JaguarXKE]

My Goflex is the desktop version, not the portable. I use it as a media server ( my iTunes music and Movies are all stored there). I want to buy the super-fast Thunderbold adaptor to make it a TB drive, but the adaptor costs $80 more than I paid for the drive.