Western Digital Elements 500GB Portable USB 3.0/2.0 Hard Drive - Power Requirement?

WD External and Portable SSD Portable SSD
1

I want to attach the above USB HD to my routers USB2 port as a NAS. The router can supply a mximum of 1.58 A for use of the router and the two USB ports.

Please advise what the power requirement of this drive would be.

I can’t get to ask WD unless I create an account - this means they could lose sales!

2

It should at least provide the same energy output as the stantard USB 2.0 specs.

http://en.wikipedia.org/wiki/Universal_Serial_Bus

5 volt DC
5.00±0.25 V
500mA (general); 5 A (charging devices)