WP7 jailbreak is on the way and there are some cool hack coming everyday to  make WP7 smartphones much more useful than ever before. You need to play with  registry of your PC to turn Windows Phone 7 into USB drive.

Warning:Remember, this hack is limited to one PC only. You can not  use WP7 as a universal USB drive using this hack.

The steps are given below.

Step 1:  Go to registry editor on your PC. Go to run and  type “Regedit” and press enter.

Step 2: Navigate to

* HKEY_LOCAL_MACHINESYSTEMCurrentControlSetEnumUSB * Look for ZuneDriver  and change following values * Change ShowInShell from 0 to 1. * Change  PortableDeviceNameSpaceExcludeFromShell from 1 to 0. * Change  EnableLegacySupport from 0 to 1.

Log off from the computer or restart it to enable the changes (not  necessary). Now plug in your Windows Phone 7. You’ll get the notification of new  hardware. You will be able to access all the files on your Windows phone 6. You  can easily perform simple operations like copy, paste, modify, rename, delete  etc.