if i buy a new hard drive will i still have all my stuff still . you know downloads, achivements, my gold ak-47 in cod4,gamertag. if not can i bring it all over to the new 1. or am i screwed and stuck with 3 gigs left.

Dont Listen to the other answers.
If you buy a new HDD, it will come with a cable, that is used to transfer your data. just follow the instructions that come with the new HDD

As for you gamertag, It will also be transfered to your new HDD. If not, you can choose to recover your gamertag.

If any other problems come up email me at rshaut@yahoo.com, with the sujecty being Xbox 360.