Hey there I know this is an old post but I hope my answer will be helpful to many people. The process is well documented with great details there. Goto this /how-to-provide-non-free-firmware-files-to-kali-linux-installer if you are still confused after reading the answer below. I copied them in FAT32 USB but installer is not detecting them: These are the list of files which installer is demanding for. It might be because the firmwares I extracted from the firmware.zip are not the one installer is asking for? It means installer is not actually detecting firmwares from removable USB. When I tap on Yes to allow installer to load missing firmware from USB, that same page is again displayed and it again asked me to load firmware. I downloaded and extract firmware.zip and extracted into FAT 32 USB. It suggests to download non-free firmware from here. I've already tried this solution but It doesn't work. Load missing firmware from removable media?

If you have media available now, insert it, and continue. The firmware can be loaded from removable media, such as a USB stick or floppy. Some of your hardware needs non-free firmware files to operate.

While boot installation kali linux asks for: I'm dual-booting kali linux with windows 10.

Kali linux usb drive