Toshiba satellite has the latest bios rev available v1 20 it does not have the ability to toggle to csm mode.
Satellite l15w b1302 boot from usb.
In theory you only have to hit f12 once but your timing has to be right.
So some tips for you.
For information on.
Download drivers software patches and other updates for your dynabook toshiba product.
The easiest way to get it to boot from usb is to plug it in with the power off.
In order to fix the problem you will have to manually change the settings in your computer to accept this boots or use rufus to convert usb sticks to uefi boot.
If you re trying to reformat or fresh install your laptop to windows 10 this should be a problem because the only alternative option is via cd dvd boot.
The official dynabook toshiba support website provides support for satellite l15w b1302.
Booting uefi usb stick on a toshiba laptop insydeh20 bios if you have insydeh2o bios you may have some trouble booting from uefi flash drive with linux or win8 or higher.
To boot a toshiba satellite from usb you usually have to pull up a boot menu or change the bios.
They will continue to develop manufacture sell support and service pcs and system solutions products for global markets.
Did your usb drive didn t work boot or the usb didn t recognize on the bios menu on your toshiba satellite laptop.
And its subsidiaries were deconsolidated from toshiba group on october 1 2018.