the new 360 known as the slim comes with either, 4 gig of internal memory or a 250 gig hard drive it will say on the box 4 or 250. if you get the 250 you get a hard drive, but if you get the 4 model you can ADD a hard drive to it either a 250 gig or a 320
gig but only the version of the hard drive made for the current slim models, the older clip on drive on the older fat 360s are not compatible with the slim models.
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