Now we see through a glass, darkly...
- Apr 5, 2016
Basically, I intend to use these for offsite backup. I let the backup run overnight, then bring the disk to work and stick it in a desk drawer. (I don't plan to take it into the field with me, or anything like that.) True, I could do that with a wall wart unit, but I can readily plug one of these into any box anywhere and not have to hunt down the wall wart.
It's a personal preference thing; as I said if you don't mind wall warts for your personal use case, that would have been a fantastic deal.
All of the WD USB drives I've bought for the last 7-10 years use interchangeable power cords. The tip size and polarity is the same. The output voltage and current are the same. I don't have to worry about the power cord when I move them from my primary site to my backup site. I just keep one at each location.