Wonder why no one stickies this topic to top, so many times its been asked, and people still don't know the cheapest option is to re-purpose an official old fat HDD, for a fraction of the cost.
So for new slim hard drive: $90 straight up
If you do this method looking at potential savings of: $40 for 10 minutes of extra work
Also if you don't need a 250 you can only save more by buying a 20, 60 or 120gb
these will register as official Microsoft HDDs by the 360 and will work exactly the same, done it twice myself.[/QUOTE]