Found this mentioned over at Engadget – apparently there’s a hardware mod to the Xbox called the X5 that allows you to add up to four additional hard drives to the Xbox. This is an external hard drive expansion kit that allows for four internal hard drives and three 40 mm cooling fans. The X5 users aluminum spacers which also act as heatsinks to the heat generated by the four hard drives (which are not included in the kit. You’ll need to get that on your own).

[Check it out via Engadget]

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