Raspbian Jessie - reinstallation to the newest OS

List of errors when trying to run sudo apt-get update:

Err http://mirrordirector.raspbian.org jessie/contrib armhf Packages
  404  Not Found [IP: 93.93.128.193 80]

Ign http://mirrordirector.raspbian.org jessie/contrib...

W: Failed to fetch http://mirrordirector.raspbian.org/raspbian/dists/jessie/contrib/binary-armhf/Packages  404  Not Found [IP: 93.93.128.193 80]

E: Some index files failed to download. They have been ignored, or old ones used instead.

 

Solution:

https://forums.raspberrypi.com/viewtopic.php?t=318358

Source:

https://www.raspberrypi.com/software/operating-systems/