One of the things many people were complaining about when Windows Phone 7 was released, was the lack of file system access from a computer to the device. While this is common for iPhone users, many Android and Windows Mobile users simply aren’t used to this, as they have always been able to browse through the memory of their Android or Windows Mobile phone – being able to use their phone as a portable USB drive. To solve this, all you have to do is open the registry editor on your windows PC, and follow the guide by XDA member cdguider. There are only a few modifications to be made to the registry, so there’s no difficult work involved. Note that editing the registry always has a chance of unwanted system problems.
Originally posted by cdguider
With the new Microsoft Windows Phone 7 platform the possibility of having access to the file system on your device has disappeared compared to the Older Windows Phones. However with a couple simple registry edits you are able to have access again to the file system on your Windows Phone 7 , just like an USB drive.
Although this was originally written for the HD2, this guide also works for any other Windows Phone 7.
Head over to the thread to get started!