look at the first youtube link at 1:10 and the second at 3:20
you can see the internal drive is definitely a SATA drive. if you take that out you can plug it directly into a desktop.
if you don't have a desktop, you can plug it into a USB adapter (pic related) for a laptop too. the reason it's best to plug it internally is you can rule out USB (or USB power) as a potential problem.