: Used by Spice and QEMU to "redirect" a physical USB device from your computer into a virtual machine.
You likely encountered this file because you are using one of the following: USB Development Kit (UsbDk) Software Development Manual usbdk1022x64msi
(USB Driver Development Kit) is a driver package often required by older virtualization software (like older versions of VirtualBox, QEMU, or Windows XP Mode) to handle USB passthrough. It allows the virtual machine to access USB devices connected to your host PC. : Used by Spice and QEMU to "redirect"