Rufus - How to create bootable media with ISO files

If you have a flash drive or disc from which you want to access a program when booting up in BIOS, the data can be saved in an .iso file - which acts as a virtual drive. The .iso image file holds the data in binary format. However you cannot download an .iso file and simply copy it to a flash drive, the standard way in Windows Explorer. To save an .iso file to a flash drive, use a free utility named Rufus, which is available here. Use the portable, or standalone version, which does not need to be installed:

[FWIW, I scanned it using Bitdefender and it was clean.] Rufus will run from the downloaded executable file and give you the option to select which flash drive you want to add an .iso image to

Rufus may take 15 minutes or more to copy an .iso file to flash drive. I used it to add the .iso file for Hiren's BootCD PE to the flash drive - it downloads from the site as a single file, 'HBCD_PE_x64.iso'. [Hiren's includes several data recovery tools, and I needed to use it to check if the drive of an old laptop I was decommissioning had been successfully wiped.].

It will take Rufus longer than an hour to add a 3 GB file to a flash drive.

When the Hiren Boot .iso file is added, you will see multiple files and folders.

I inserted the flash drive into the laptop that I wiped, and pressed F12 [the laptop was a Toshiba - other hardware may require another function key] to enter BIOS - the firmware. The flash drive was recognized:

. . . .Hiren's BootCD PE successfully ran: