It has the capability to mount a hard drive behind it, dunno exactally how, but it says its possible..
As for the unit, i love it... Now i can turn my fans off at night so i can actually sleep!!!
The only thing that bothered me was the fact that all the fan wires were 3 pin, while all of mine are 4pin Molex... Sorta easily solved, i cut the wires out of the 4pin Molex and attached them to a 3pin Female. Works great now, just took an hour or two to set up...
I got mine from comgeeks for $36 over the winter holidays, very good bargain... I reccomend
