Pyro as Bill said:
USB-SSDs can go even faster. 100GB in less than 2 minutes. |
Most external SSDs with USB-connection will be SATA-drives inside, so they'll probably copy ~30 GB per minute (500 GB x 60 seconds), but yeah external SSDs or HDD-raids (My Book Duo) should be able to copy 100-GB-games in 3 - 4 minutes.