@Jack-S. i think for the bios drivers update with your Dell OptiPlex 3020, you can get it from here: https://windows10skill.com/download-dell-drivers-for-windows-10/
A
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RE: Optiplex 3020 TFTP Issue
@Jack-S. i think for the bios drivers update with your Dell OptiPlex 3020, you can get it from here: https://windows10skill.com/download-dell-drivers-for-windows-10/