iMac 5 k: external hard drives (no SSD), Thunderbolt 2 vs 3 USB?

Hello

I just bought a new iMac 5K with 3 t of Fusion in the car and I am looking for an external drive make backups via Time Machine. I'll go for a drive of 3 t, not SSD.

I wonder if it's worth buying a thunderbolt drive 2, as some one in a store told me that the reader go any faster than a USB 3 thanks to its native speed. Is this true? a USB 3 drive will even work or there is no difference in speed between the two devices?

Thank you

http://barefeats.com/hard202.html

Tags: Mac

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