Is there a way of moving a file share folder from one hard drive to another hard drive on the same server without interrupting any of the active file server sessions that clients might have open?

Is there a way of moving a file share folder from one hard drive to another hard drive on the same server without interrupting any of the active file server sessions that clients might have open (by using Shadow Copy methods, etc.)?

I need to do this since the hard drive where these files are currently stored is running out of free space.

If this can't be done only through using Windows, then is there some sort of program or utility that I can purchase that is able to do this?

While the files are being moved, they need to be immediately availed using the exact same server and share name.

The operating system is Server 2003. These files are always open, in use, and being modified 24 hours a day and I don't have any time to prevent user connections while these files are being moved.