I've got a Raspberry Pi 3B running Jessie. "Sudo apt update" is throwing many 404 errors. Here's an example:
Ign http://mirrordirector.raspbian.org jessie/non-free Translation-en_GB
Ign http://mirrordirector.raspbian.org jessie/non-free Translation-en
Ign http://mirrordirector.raspbian.org jessie/rpi Translation-en_GB
Ign http://mirrordirector.raspbian.org jessie/rpi Translation-en
W: Failed to fetch http://archive.raspbian.org/raspbian/dists/jessie/main/source/Sources 404 Not Found [IP: 93.93.128.191 80]
W: Failed to fetch http://archive.raspbian.org/raspbian/dists/jessie/contrib/source/Sources 404 Not Found [IP: 93.93.128.191 80]
W: Failed to fetch http://archive.raspbian.org/raspbian/dists/jessie/non-free/source/Sources 404 Not Found [IP: 93.93.128.191 80]
My sources.list file is:
deb http://mirrordirector.raspbian.org/raspbian/ jessie main contrib non-free rpi
deb-src http://archive.raspbian.org/raspbian/ jessie main contrib non-free rpi
Thanks.