WOW!
+1 for ojas
109.99 for an external 2.5" 500GB USB3.0 drive, what were they smoking?
Lets not forget that the USB3.0 cable is WD's proprietory cable, lose that and be prepared to pay.
WD's website makes no mention as to the type of drive used in this model nor drive speed but its a good bet that its a Blue series at 5400.
I purchased a WD 2.5" 500GB Blue Drive and a Vantec USB2.0 enclosure (metal) both for under $60 taxes in.
Don't get me wrong, I love WD and will continue to purchase WD products, however at this price point, cheaper alternatives can be had i.e. build your own!
Hope this helps.