deb http://deb.debian.org/debian buster main contrib non-free
deb http://deb.debian.org/debian-security/ buster/updates main contrib non-free
deb http://deb.debian.org/debian buster-updates main contrib non-free
-#deb http://ftp.debian.org/debian buster-backports main contrib non-free
\ No newline at end of file
+deb http://ftp.debian.org/debian buster-backports main contrib non-free