This is dead easy to put together, all the bits are there, including a teeny tiny screwdriver for the teeny tiny screws that are easy to lose, but they do give you a spare one in case you drop one on the carpet.
It even comes with a swish leather case, something my much more expensive WD passport drive didn't have...
After that it's just a case of plugging it in.
It comes with a power lead for people who don't have powered USB ports but as that terminates in a USB plug it's next to useless.
It also comes with some software on a mini CD, but don't bother with it, the thing is just a storage device. Keep it simple...