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USB 3.0 Versus 2.0
"This year, USB 3.0 hard drives and other gadgets are finally hitting stores. You can buy them — they're real! They cost a little bit more up front, but the marketing speak promises data transfer speeds 10 times faster than the old USB 2.0 standard that you've been using for the past 10 years.
Is USB 3.0 really that much faster? And even if it's not, is it fast enough to justify the slight premium? Experts have already tested it. Here's what they discovered."