installing firmware during stretch install

Hi. I am trying to install stretch onto my AMD64 box using wifi. During install I get a missing firmware message asking me to supply rtl_nic/rtl8168g-2fw on removable media. I found rtl8168g-2fw on my laptop in lib/firmware/rtl_nic and copied it to a folder I labled rtl_nic on a flash drive.

Failed installs

I have for some time been, and after many attempts remain, unable to install Debian, which I previously have used for many years. The failures occur during "select and install", about a third of the way through, but not always at the same place. My terabyte disk is partitioned with /boot of 1