After too many years of tapping F keys to access the boot menu, I forget the new Windows 10+ way.
Hold the shift key while clicking restart. Keep holding the shift for (we never know how long so just hold it).
. . . Now choose device to use and pick your USB drive.
On my Dell XPS 13 (and if it's going to happen anywhere it's this dang XPS 13) It would not see the drive.
I found that "fast boot" was on. I always turn this off but this was a recent clean OS install.
After turning "fast boot" off it worked.
Native USB slots
* The BIOS may not activate the USB slot to the keyboard if your keyboard is not plugged into a native slot. Addon cards or hubs may not activate early enough.
* If USB drive is not listed as a boot option also try a native motherboard slot.
Boot Option F Keys
Acer F12
Asus F8
Dell F12
HP Esc
Lenovo F12
Toshiba F12
