I need this driver. Where can I download it in an inf file?
For what O/S?
This driver (part of USB 3.x support) is built into Windows 8.1 and 10. You should only need a driver package if using Windows 7 (though there is an update package for Windows 8.1).
For Windows 10. I need it to restore an Acronis backup from an old to a new computer using dissimilar hardware. The recovery software keeps on asking for that driver.
I am not sure what you are going to do. The driver for USB 3.0 is built into Windows 10, so there is no downloadable package.
Retrieving data ...