Asus STRIX Z270F GAMING - Legacy Usb Support; Usb Configuration

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ASUS STRIX Z270F GAMING BIOS Manual
1.6.11 USB Configuration
The items in this menu allow you to change the USB-related features.
The Mass Storage Devices item shows the auto-detected values. If no USB device is
detected, the item shows None.
Legacy USB Support
[Enabled] Your system supports the USB devices in legacy operating systems.
[Disabled] Your USB devices can be used for BIOS setup only and cannot be
recognized in the boot devices list.
[Auto] Your system automatically detects the presence of USB devices at startup.
If any USB devices are detected, the legacy USB support is enabled.
XHCI Hand-off
[Enabled] Enables the support for operating systems without an XHCI hand-off
feature.
[Disabled] Disables the XHCI Hand-off support.
USB Single Port Control
This item allows you to enable or disable the individual USB ports.
Refer to section 1.1.2 Motherboard layout in your user manual for the location of the USB
ports.