Well, thank you. I was just asking here to make it more conveinient. Also, I was looking at the xbox website, which only advertised the 120 GB, so I thought that was the only hard drive there. Also, I was hoping to find it at a retail store, and not buy it through a website. Thanks anyways.

Well, ok, is there perhaps a smaller hard drive that costs less than 150 dollars?

I have just gotten a Xbox 360 Arcade and I'm wondering if the 512 MB memory unit makes it run faster, like the 120 GB Hard drive. If not, is there a cheaper alternative than the stupid Hard drive? Also, can I download arcade games with a memory unit?