How can you reset the Xbox360?

I would like to sell the Xbox and completely reset it

Create a new profile male!

Then all data are gone, if I delete all andergn?

So when you create a new avatar, it's like this:

If you start by selecting the profile on your new avatar clicks, all the achievements that you've mastered in games have disappeared, but the games, music, etc. You uploaded are kept!

When you click on your old avatar all your old achievements are there!

So you can play a new life but have your old one still available

I would like to sell the xbox but yes. That all data should be deleted completely

Oh! You just have to:

1. If you have music or video in it, just delete it

2.Don't sign out and delete your avatar!

3. Packing

4. Sell