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When we flip the Guardian around once more we can see that the entire front bezel is a door that can be opened so that you can access your drives and such. Five 5.25" and two 3.5" internal drive bays. There are also 3 3.5" internal bays for your hard drives. It's also the location where Power and Reset buttons can be found.
On the inside a small signature from the developer...
And once we remove that we can see a small printboard that operated the front-door LEDS.
Here's a nice photo of the left window, again really beautiful to see. In my opinion one of the best designed side-windows I've ever seen.