WP Instant Insight by JLM1

The information that is displayed especially helps to make bulk maintenance tasks easier.

This extension shows the user useful information about WordPress and PHP server settings. After logging in to the wp-admin panel with an administrator account you can use this extension to quickly check information like upload_max_filesize, php_version or get notified about changes to the site's content since the last marked backup.

The manual backup marker helps detect content changes since the last marked backup*, so routine updates can be sped up when nothing changed by skipping unnecessary backups.
New addition: When UpdraftPlus is installed on the site you can use the "Start UpdraftPlus backup & mark" button while on the UpdraftPlus page to let the extension create a full local backup and set the marker automatically after it successfully finished.

* (Applies to standard WordPress content types: pages, posts, comments, and media uploads.)