Chapter 3 – AMI BIOS Setup32Mobile NVR VPC-5500S3.4.5 Advanced: USB ConfigurationOptions summary:Legacy USB SupportEnable Optimal Default, Failsafe DefaultDisableEnables Legacy USB support. AUTO option disables legacy support if no USBdevices are connected. DISABLE option will keep USB devices available only for EFIapplications.USB3.0 SupportSmart Auto Optimal Default, Failsafe DefaultEnabledDisableEnable/Disable USB3.0 (XHCI) Controller support.