hello evryone how to install back version 5.20 of router os in rb433 because now i have 6.0 but i want to install 5.20,thanks

I think it must be possible to upload the needed packages, and than reboot?
If that is not working, try the downgrade action from the /system packages menu

hi,

it suggested to use netinstall for uploading 5.20 or any other OS instead of preloaded

how to install with net install in rb433?