Another thing to strongly consider when transferring such large amounts of data is "Minimal Logging" and the proper use of Trace Flag 610, which has been available since 2008 R2. It can save not only a relatively huge amount of time, but a huge amount of log file space and, sometimes, MDF space depending on when you build the Clustered Index).
--Jeff Moden
Change is inevitable... Change for the better is not.