Disabling the Upload Watcher
The Recommended practice is that you disable Upload Watcher and which ensures that the only way to upload files is from Media Library. This ensures that you can only upload files from within the Sitecore client and have control over the files that are uploaded .
When Upload Watcher is disabled, files that are placed in the /upload folder in the website root are not automatically uploaded to the Media Library
To disable the Upload Watcher, remove the following highlighted
line from the <modules > section of the Web.config file