There is, but you don't want to do that. It's more trouble than it's worth and can end up causing you a lot of issues in the end.
You would be far better off just using the new drive to store everything that cannot easily be replaced in the event you have to reinstall Windows at some point, like in the case of an infection or system corruption, or drive failure. Combining old and new storage into one volume is a very bad idea.
If this is a gaming machine, I'd move or install all the game files on the new drive, as well as moving any pictures, movies, music or personal documents you would like to NOT lose if something happens to the C: drive, onto that drive.
In addition, it would be a VERY good idea to also either obtain another drive, to BACKUP that information onto, or at the very least get a spindle of DVDs and backup all your important files onto optical media so you have a copy of it in the even something goes wrong with the storage drive, which it will, sooner or later.