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This device supports USB 3.1 (USB standard released in July 2013; successor of USB 3.0), which standard was later renamed as "USB 3.1 Gen 2" - only to confuse everyone.
Sorry, there was a problem. Please try again later.according to there website it's gen 1 https://www.sandisk.com/home/usb-flash/extreme-go-usb (Under the specs)
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