That looks a lot like a standard 3.5&quot; HDD case as found in many desktop computers with the Raspberry Pis possibly just lying in it? I might very well be wrong, but it looks a lot like e.g. <a href="http:&#x2F;&#x2F;www.overclock3d.net&#x2F;gfx&#x2F;articles&#x2F;2014&#x2F;11&#x2F;21055622736l.jpg" rel="nofollow">http:&#x2F;&#x2F;www.overclock3d.net&#x2F;gfx&#x2F;articles&#x2F;2014&#x2F;11&#x2F;21055622736l...</a> or <a href="http:&#x2F;&#x2F;www.scythe-eu.com&#x2F;uploads&#x2F;tx_cfamooflow&#x2F;Gekkou-HDD-Cage-2_03.jpg" rel="nofollow">http:&#x2F;&#x2F;www.scythe-eu.com&#x2F;uploads&#x2F;tx_cfamooflow&#x2F;Gekkou-HDD-Ca...</a> .