Item model number 00124161. Never use both connections simultaneously. USB 3.1 Generation 1 - SuperSpeed data transfer rate of up to 5 Gbit/s - Up to 10x faster than HiSpeed USB 2.0 (480 Mbit/s) - Downward compatible with HiSpeed USB 2.0 The reading speed of 40 MB/s can only be achieved with a USB 3.0/3.1 (Gen.1) interface or with a USB-C 3.0 interface.
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