The industry is split on which one will ultimately inherit USB 2.0's throne (or indeed, if either one of them will), so caveat emptor. For example, Apple and Intel are both backing another super-fast connection called Thunderbolt (formerly Light Peak). Your connection is only as fast as the slowest component, whatever that may be.Ĭompeting file transfer standards do exist. The same rule applies if you have a 2.0 hard drive and a 3.0 laptop. If you buy that 3.0 hard drive but still have a 2.0 laptop, you'll be able to use it you'll just pay more money for performance advantages you can't yet enjoy. USB 3.0 devices also work with 2.0 partners, but only at 2.0 speed. And not even all new computers and hard drives support USB 3.0, so make sure you take a close look at the specifications for the hardware you plan to buy. Thus, if you're in the market for an external hard drive for your laptop, both the hard drive and the laptop have to support USB 3.0 in order for you to take advantage of the speed it offers, which means they both have to be very new. That holds for computers just as it does for hard drives and other peripherals. The first devices that were certified for USB 3.0 were introduced just over a year ago, and they're only just now arriving in stores. External drives come in all shapes, sizes and speeds. But if you only need some extra disk space for backups and libraries, then even slow exHDD is a godd choice, considereing its price. All this talk of speed is moot if you don't have a computer that supports this new technology, and very few do at this point. External HDDs are usually 2.5 inch with a rotation speed of 5400 while internal HDDs are 3.5 with 7200.
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