I can boot my ENVY from a USB 2.0 thumb drive but not a USB 3.0 thumb drive. Can I change that ?

[RayInWisconsin]

I use a product named "Reflect" from an organization called Macrium to create a backup image of my ENVY notebook to a USB attached external disk drive. (Western Digital My Passport.)

I create images of my ENVY hard disk disk at least once a week.

Works great.

The Macrium Reflect product also allows me to create a "Rescue" usb thumb drive that I can boot my notebook from so that I can restore a previously created image from my Western Digital "My Passbook" drive, back on to my ENVY.

This also works great.

Now, here my issue.

My HP ENVY notebook seems to only recognize a USB thumb drive at boot time if the USB Thumb drive is USB 2.0.

And not if it is USB 3.0.

When I boot the ENVY and press F9, the USB 3.0 thumb drive doesn't not appear as selectable.

If I'm using a USB 2.0 thumb drive then it DOES appear as selectable.

I'm confused as to why.

There is a setting within the BIOS, under the "System configurations" tab called "USB 3.0 Configuration in Pre-OS".

And I have that set to "Enable". (Based on my understanding of the setting.)

I also have "Legacy Support" enabled and "Secure Boot" disabled.

May I ask for some guidance on what I might do, so that I can use a 3.0 USB thumb drive to boot from ?

Here is my environment:

Product name: HP ENVY Notebook - m7-n101dx
Product Number: M1W07UA#ABA
Processor: Intel(R) Core(TM) i7-5500U CPU @ 2.40GHz, 2401 Mhz, 2 Core(s), 4 Logical Processor(s)
BIOS Version/Date: Insyde F.47, 12/11/2017
BIOS Mode: UEFI
Installed Physical Memory (RAM): 16.0 GB
Disk: 1 TB SSD
OS: WIndows 10 Home Premium Version 20H2 (OS Build 19042.685)

Thanks