This guide will show you how I did that, its worth mentioning that you can also hack a 20gb, 60gb and 120gb drives, however i think doing a 250gb is the best value for money.

If you have an Xbox 360 slim you can also hack a hard drive using this guide and connect it directly to the console, have a look at the end of the guide for information on how to connect your hacked drive to an Xbox 360 slim.

Ok lets get started, first you will need to buy a hard drive to use in the Xbox 360.

Hddhackr will only work with the following Western Digital Drives:
- WD Scorpio Series BEVS/BEAS
- WD Scorpio Blue Series BEVS/BEVT/BPVT
- WD Scorpio Black Series BEKT/BJKT
- WD VelociRaptor Series
- WD AV-25 Series BUDT

As of version 1.30, Hddhackr now works with all sizes and versions of the Western Digital Scorpio Series. 
You can not use another make of hard drive for this hack, it has to be one of the supported Western Digital drives.

I purchased a 250gb WD Scorpio Blue Series drive (WD2500BEVT) for around £30 at CCL Computers.
For those of you who live in the States, you can get the same drive for around $47 atNewegg.

I would highly recommend you also purchase a Western Digital Scorpio Blue Drive, you have nothing to gain by buying a more expensive drive.

The first thing you will want to do is create a bootable USB drive, for this I used a tool called Bootable USB Drive Creator Tool.

Download Bootable USB Drive Creator Tool

Unzip and load the program, be sure to right click and run as an administrator.

Select your USB drive
Set the file system as FAT
Tick quick format and Create bootable drive
Select the box with 3 dots and choose the USB Drive Boot Files\MS-DOS folder as the location.
Hit start and you will have a bootable usb drive within a few seconds.

Now Download Xbox 360 250GB Hard Drive Security Sector and Download HddHackr v1.30 Build 20110303

For anyone who wants to hack a diffrent size drive here are the security sectors that can be used for a:
20gb drive
60gb drive
120gb drive

Unzip both to the USB drive you just made bootable

Be sure to rename the HDDSS_250GB.BIN to HDDSS.BIN

The end result should be something like this, don’t worry you will not have an UNDO.BIN yet.

You will need to shut down your pc now, I would advise you disconnect all the other hard drive in your computer just to stop you accidently hacking the wrong drive!

Now connect the hard drive you want to hack to your computer