unallocated space

I bought a 3 TB drive today, to replace my, existing 1 TB drive which was 95% full. This is my "D" drive and is data only, no OS on it. Its actually all my WEB server data, for IIS. (I'm on Windows 8.1 Enterprise 64 bit). My plan was to use Paragon Hard Disk manager and clone my existing 1 TB...