USB cable is VERY SLOW. Take the memory card out and use a USB card reader or the card slot (if available) on your computer.
My computer accepts SD cards, but not CFexpress cards. I use a ProGrade Digital "Dual-slot CFexpress Type B and SDXC Card Reader" plugged into my computer. This reader can transfer from both types of card at the same time, very fast.
My desktop computer does not accept any cards but I have a similar reader to yours that takes CF and SD cards. I have never tried reading both types at the same time. It never occurred to me. I must give it a try.