re-formatting my xbox, just got it used

[jaymatic21]

so i wanna know if it's an issue to reformat the hard drive within the system menu will thin bring the xbox back to like I just opened the box brand new? Why is there only 13gig free on my 20gig hard drive?

Also How do you change the dashboard wallpaper

 

[SpikeR5]

Why is there only 13gig free on my 20gig hard drive?

http://www.360mods.net/Forums/viewtopic/t=2943.html

and

http://www.xbox.com/en-US/support/systemuse/xbox360/default.htm