I bought an IBM USB floppy disk drive on eBay, as I have some info on diskettes that I wanted to access.
My recently built PC has Win7 x64 on an Asus P8Z68-V/Gen3 motherboard, which is SATA 6 and USB 3 enabled.
Unfortunately it has no IDE connectors or floppy drive connectors, hence my purchase.
When I plugged the drive in, I got the usual installing your hardware message, but it ended in failure - Code 10 in device manager.
I tried finding drivers via Google etc with no luck, then I thought perhaps it's not compatible with USB 3, so I plugged it into a USB 2 port, of which I have several. This time it was successfully installed, and works OK.
I had understood USB 3 was backwards compatible, but it appears not.
I wondered if anyone else has had compatibility problems of this nature, and if any solutions have come to light.