It is a "codeless kext" that tells macOS exactly which physical ports on your specific motherboard should be active. Since every motherboard model has a different internal layout (even different BIOS versions can change things!), a map made for a Gigabyte board won't work on an ASUS board. 🚀 How to Get YOUR Correct Kext
Why You Can’t Just "Download" USBPorts.kext (and What to Do Instead) usbports.kext download
You're looking for information on downloading usbports.kext . It is a "codeless kext" that tells macOS