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#21
I have a clean install of Win10 Pro on a Custom computer built 6+ years ago and I have a Dell external USB 3.5" floppy drive [made by TEAC]. I plug it into a USB 2.0 port and it is identified in Device Manager. I put in a floppy disk and it gets seen in File Explorer under This PC. The same occurs with separate USB 3.0 ports provided through an add-in card.
I bought a new Win10 Home computer about 6 weeks ago that has front combination USB 2.0 and USB 3.0 ports and the floppy drive is not seen by anything. However it does work when plugged into a USB 2.0 port on the rear of the computer.
Bottom line: I've found there are USB 2.0 things that simply don't always work with USB 3.0 ports even though the ports are supposed to be backward-compatible such as older Thumb drives and printers.