Since the introduction of USB 3.0 major companies try to expand their product line in to the high speed field. Lets face it, faster connection equals faster transfer speeds so you can get your job done faster. For moving small files, under 5 megabyte, USB 2.0 is perfectly acceptable but when you are trying to move larger files you might have to wait for a while. How much is a while? Well expect a 50 gig file to take and hour and half. By using USB 3.0 connection, you should be done with that 50 gig transfer just under 15 minutes. Value your time? Then you better stick to USB 3.0.