3TB Green 5v requirement

I am trying to find out the 5v requirements for the 3TB Green WD30EZRX drives. I found a post from last year http://community.wdc.com/t5/Desktop-Portable-Drives/Startup-power-current-for-WD20EADS-and-WD20EARS/m-p/223896 that said they take .55A, but the datasheet doesn’t say. Anybody know if that is still current?

The data sheet does not show the info you are looking  but both drives seem to have very similar specs 

in this case Fzabkar explanation should also apply