If you’re looking for a plugin that allows registered users to upload images and PDFs to your website and then notifies you or enables you to download the files from the WordPress admin, consider the following option:
NextGEN Gallery: NextGEN Gallery is a powerful image gallery plugin for WordPress. It includes a feature that allows registered users to upload images to your website. You can also set up custom galleries and albums to organize the images.
WP File Download: A file manager plugin for WordPress that includes a feature for allowing users to upload files to your website. With WP File Download, you can make a file category and regulate who can upload files by setting permissions. When a user uploads a file, you will receive a notification or check it directly in the WordPress admin to download the files.
Jotform: You can also limit the number of files a user can upload, and you can also customize the file types and sizes.
File Upload Types by WPForms: This plugin lets you create custom forms with a file upload field that allows registered users to upload images and PDFs. You can also set limits on the file size and types.
There are many other plugins available that offer similar functionality, so it’s worth doing some research to find the one that meets your needs.