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Quote: Originally Posted by allanb I have a Mac Mini with peripherals connected through a USB 2.0 hub. I intend to buy an external drive, mainly for Time Machine backups. Does it matter whether the drive is rated 2.0 or 3.0 ?

No, it doesn't. If the drive is mainly for Time Machine then the speed is rather irrelevant* as you are not interacting with it. you let the initial backup run overnight, after that the copy time is usually under a minute. Do we really care wether it takes 15 or 40 seconds?


* ok, a USB 1 interface would be unacceptable.