"Swappable hard drives are nothing new, we have seen them for over 5 years now. One thing that was always a pain was that if I wanted to move something from my desktop to laptop I could not with a swappable hard drive, I had to do it with a flash drive or USB hard drive. There are drawbacks to both of these first the flash drive can only hold so much data and the external USB hard drives are usually big and are not fun to carry around with you. Icydock has a solution for this problem the MB663 hard drive enclosure. It is a 2.5-inch external enclosure that comes with a 3.5-inch internal swappable bay."