In terms of portability, the Western Digital model wins out.Įxternal drives requiring their own power supply have advantages too though: they're typically faster, and offer greater capacities. Perhaps the key difference between the WD My Passport and the Seagate Backup Plus external hard drives is that the WD model is USB powered – so you can just plug it into a laptop or desktop and get going – whereas the Seagate drive needs a separate mains power supply in addition to the connection to your computer.
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