canon 1dx mark ii

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    Is CFast card reader necessary if you just want to use cable for transfer from camera?

    I have a Canon 1DX Mark ii. I bought a Lexar Cfast card reader but it sometimes work, sometimes don't read the card. What I found out that, I could use USB 3 cable to directly download footage of cfast card from camera to the computer. Will there be any difference in transfer speed if I use the...