Help All of a sudden WD MyBook doesn't light up and drive doesn't show up on my computer?

Could this be a power issue? I hope I haven’t lost all of my data on my portable external HD?? Thanks for any help with this.

It could very well be a power issue related to the power adapter. Maybe you should try contacting WD’s Technical Support about this. You can do so either by phone or email.

To Contact WD for Technical Support