The Zune can be used to store and transfer file formats such as zip files, pdf files and word documents. Want to take your data with you when you travel - Check out this little mod where you can use your Zune as a portable hard drive -no Zune hardware or software changes are required at all.

Here’s the Step-by-Step guide

Important Note:  Make sure your Zune is not plugged in and your Zune software isn’t running

1. Open up regedit by going to the start menu and selecting “run”.
2. Type regedt32 and hit “OK”
3. Browse to HKEY_LOCAL_MACHINE\System\ControlSet001\Enum\USB\
4. Search for “PortableDeviceNameSpace”. This should be contained in the Vid_####&Pid_####\########_-_########_-_########_-_########\Device Parameters within the above …\USB\
5. (The ##’s listed above will be numbers and letters specific to your Zune)Change the following values:
6. EnableLegacySupport to 1
7. PortableDeviceNameSpaceExcludeFromShell to 0
8. ShowInShell to 1
9. Plug in your Zune, and make sure the Zune Software starts up. 
10. You can now open My Computer and browse to your Zune; note it is not assigned a drive letter.