The default Debian Linux installation CD/DVD may not contain proprietary firmware (drivers) for your hardware. From this reason, it is up to the user to load this non-free firmware during the Debian Linux installation. This article helps you to prepare your removable media to load missing firmware during the Debian Linux installation.
This is a companion discussion topic for the original entry at https://linuxconfig.org/how-to-load-missing-firmware-from-removable-media-during-debian-linux-installation