By default, WordPress stores all uploaded media file in uploads folder within the wp-content directory. However you can easily change this to a custom location.
To change the default upload folder copy the following code and paste it inside your wp-config.php located. Also, don’t forget to change ‘media’ with your own desired folder name.
//Change Default Uploads Folder define('UPLOADS', 'wp-content/media');
Note: Renaming the existing uploads folder may cause unexpected results. Use it at your own risk.
Useful Read: How to Set a Minimum Comment Length in WordPress