wordpress

If you are unable to post in Wordpress, you might want to add this to your wp-config.php: define( ‘WP_MEMORY_LIMIT’, ‘256M’ );

Also install classic editor and disable Wordfence completely (look in .htacces) and remove or rename .user.ini

There are many backup solutions out there for wordpress sites.

For example these plugins:

UpdraftPlus can be connected with dropbox.

Jetpack

backWPup

Among others.

You might also want to build your own backup routine with cronjobs on the hosting server.

Remember to backup!