Best Buy has the Seagate External Backup Plus 5 TB drive for a low $160. This is one of the best TB vs price ratios on large capacity drives. Free shipping.

These also work on the Mac with a free NTFS driver found on the drive itself.

I've had 2 external Seagate Backup Plus devices still going strong after the 2 year warranty period. They tend to be 5xxx RPM drives in there so don't expect a speed demon.

Update on 2014-04-30 19:09 by Mike Mu

This must have been a price mistake, because the price has been raised.