From the device’s command line (bootloader or busybox shell), ping your TFTP server:

The switch asked for the server's IP. I gave it mine. It asked for the filename. I typed it in, heart hammering. For a moment, there was silence. Then, the TFTP server logs flickered to life: “Sending file... block 1... block 2...”

If the download is a .zip or .tar file, extract it to a dedicated folder (e.g., C:\TFTP ).