MSI AM-690E User Manual page 47

Set to [Disabled] only if you want to use any USB device other than the USB
mouse.
USB 2.0 Controller mode
Use this field to select the USB 2.0 mode.
USB Mass Storage Device Configuration
Emulation Type
This setting enables you to set the type of device you want the USB mass
storage device to emulate.
BIOS Setup
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