Drupal updates recommended procedure
Keeping the to Drupal core and each plugin updated and current with the security releases is something that we can't do as each installation is special.
We recommend that you - as the webmaster who designed the Drupal site- makes the updates.
Here is the procedure we recommend:
1- Make a backup of the site from the Plesk Panel in case something goes wrong with the update.
2- Update Drupal and its plugins according to the Drupal Update instructions (see below).
3- Then if the site does not work fine and you encounter errors during this process, follow the procedure in the Drupal Update instructions for debugging.
If you are unable to make it work, restore the backup you made just from the Panel before the update.
4- Once the site works well, make a backup of the updated site from the Plesk Panel for possible disaster recovery, and delete the previous one.
Plan on checking for updates at least once a month.
Subscribing to Drupal's and each Plugin's manufacturer announcements is recommended.