20 Gb/s USB 3.2 Gen 2x2 Type-C Interface

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New member
B&H has a 128GB CFexpress Professional Type B Card paired with a 20Gb/s USB 3.2 Gen 2x2 Type-C card reader. I have been trying to determine if such card readers will work in a type C 3.1 Port... I would think that the read speeds would be less yet I'm thinking I might be future-proofing myself with this reader.


Steve W

Well-known member
Supporting Member
USB 3.2 is backward compatible with USB 3.1 and USB 2. The speed of USB 3.2 is roughly double that of 3.1.


Supporting Member
Should work all good, with slower speed. If there is one thing that annoys me, it's lengthy cards transfer. I don't know which reader that is but I bought several readers from various average brands displaying super fast speed in theory, but in the real world they sucked big time, starting fast and quickly losing performance to a sustained 45mb/s average. I then got a sandisk and the speed was much better (understand: sustained 150-200 mb/s during all the transfer). I've got some acquaintances using prograde readers and they're apparently excellent.