I'm going to make this as detailed as possible... I have the new 4gb 360 Slim with the 250gb addon.
When I start my console up, it takes almost two minutes to get past the splash screen, and even longer when I try and go to the memory panel. I know part of the reason it's running so slow is because I need to clear my cache. However, when I finally get to the memory panel, it shows that my hard drive needs to be formatted. I follow the on-screen instructions to do so, and even though it says it was successful, it still shows that it needs to be formatted. Basically I'm being thrown for a loop.
I'd also like to note that when I remove the 250gb addon, everything runs normally.
I've tried formatting the hard drive several times, but still no luck! Does anyone know how to fix this?