Fucking piece of shit Xbox

Something has been fubared with my Xbox for a long time now. I have no idea what the problem is but I can't download anything onto my hard drive. Well that is not entirely true but anything over 30mb is usually a no go. Most of the time downloads stop at around 34 percent and then that's it. I have reformatted my drive, cleared the cache over 1 million times, etc. Sometimes if I clear my cahe, delete the download, restart the box and try the process over and over it eventually works. It once took me maybe 20 tries of doing that process just to download 1 rockband song. Then there are other times when randomly it lets me download a big file like a demo or map pack. So, basically I am pissed because I want to play the new W@W maps and they won't download. SO FUCK YOU XBOX YOU SONOFABITCH. EAT MY FUCK.

So what do I need here, a new hardrive or is it another issue altogether? I would hate to buy a new HD and then have the same shit happen again.