I'll describe this to the best I can, I'm not too knowledgeable with modding Xbox 360's.
What I think this is modded with is Xtreme firmware with that update for newish games such as Assassin's Creed Brotherhood and NFS Hot Pursuit.
There's no hard drive included I'm afraid.
It's also the HDMI model and I've popped below a picture of the manf date.
If you need any more information, pop a message below. :)
Looking for £60 delivered via Collect+
PPG / Bank Transfer