this post is totally copied from antman1 but haven't seen it on the tech game and it is probably the most useful thing I've done to my 360 well besides RGH

This mod is a MUST DO!! This mod will allow you to hook up any size hard drive (Currently tested 500gb) as the Internal Memory unit on a 4GB Xbox360 Slim Console. And the real kicker is it can be a Reset Glitch Hack console or a Stock Console on Xbox Live (Use at your own risk). I show a video of the mod here in action after I installed it. The original mod was discovered and created by T3CH Warrior. Serious credit goes to him for sharing his findings and tests.

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First you will need a USB Extension cable that you are willing to cut up.
next you will need a 15 watt soldering iron flux and solder.

Now you want to take your Xbox360 Slim apart

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If you currently have a 4gb Internal memory module you will need to unplug it. (Make sure you get your files off it and put on another device before you remove it.)

Now you will need to run the half of your extension cable that is female through the side pieces of the case and through the hole near the Internal Wireless adapter. (I had to make the hole a little larger with a screw driver)


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Now you will need to prep your wiring to be soldered to the correct spots on the 360 main board and of course you will want to hot glue the wires to secure them. Here is the wiring Diagram:

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And here is what mine looked like when I completed the soldering:

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Now once this is completed I recommend testing the connector and if all tests ok then you can reassemble your Xbox360 Slim. As the picture shows it will show the plug hanging out. I used double sided tape to hold my cygnos360 switch and now the usb plug for this mod. Works great.

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And thats it. You are now done. You can now use any hard drive and it will show up were the 4GB Memory Unit was showing. When you first plug the hard drive in and go to the Storage section it will show as Unformatted, If you have anything on the hard drive or memory card make sure you back it up cause the data could be erased when the 360 Formats it. I tested this on my Stock nand as you can see from the video and also on my RGH nand and it works on both. Use on Xbox Live at your own risk. We never know what Microsoft will look for when banning a console. I am currently using mine on the Stock Xbox Live Dash with no problems as of today since I did the mod.



If you do this mod and you are using a 250GB console or Special Edition Console and you cannot see the internal memory in your storage area then you may have a KV on your console that has the Internal Memory unit disabled. If this is the case you will need to Reset Glitch Hack your console and use a keyvault from a 4gb slim to build your new RGH image so it will be enabled. However you cannot go on Xbox Live with RGH consoles.