TeraCopy also copies very large files at the highest possible speed.

TeraCopy is a compact program designed to
to copy or move files at the maximum possible speed.

Similar to a download manager, copying processes can be interrupted and continued again.

A portable version for use on a USB stick is also available. 

 Features:

• Copy faster
  TeraCopy uses dynamically regulated buffers to reduce positioning times. Asynchronous copy speeds up file transfer between two physical hard drives.
• Pause and summary file transfers
  Pausing copying is possible at any time and one click is enough to continue copying.
• Error recovery
  In the event of a copy error, TeraCopy will try several times and in the worst case will skip the file and continue the other copy jobs.
• Interactive file list
  TeraCopy lists faulty file transfers, lets the user solve the problem and then only copies the problem files.
• Integration of the shell.
  TeraCopy can copy and move the Explorer functions.
• Full unicode support.
• Windows 7 x64 support.
  

See also our article:
Copy files quickly and easily with Teracopy

Update: TeraCopy 2.2 is available in the download box.