I had two Iomegas (my two oldest still work very well) and two Seagates (one broke about a year after purchase and had to be thrown out, the other still works fine, newer, higher capacity but slower than Iomega portable drives) USB 2.0. This is my first USB 3.0 portable drive and so far it's been excellent. It's faster than the rest, not only when plugged into a USB 3.0 port (as expected), but even when plugged into a USB 2.0 port.
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