mustela

Maven Member™ is less about membership and more about restricting access to certain areas of your site. While we are planning on payment integration options, the main problem this plugin solves is: do you have sensitive content but don’t need a plugin that takes over your site or requires hours of setup? Bingo!
Documentation is in process and feedback is welcome. You can use the forum or please ask submit any questions or suggestion to mavenmember@gmail.com! Thanks!
<h4>Features:</h4>
<ul>
<li>Restrict access to posts, pages, and categories</li>
<li>Login inline with content rather than using the WP login page</li>
<li>Create your own custom registration form</li>
<li>Hold new registrations for admin moderation/approval</li>
<li>Customizable templates for login and registration</li>
<li>Captcha in the registration form</li>
</ul>

Maven Member

Maven Member™ lets you protect pages, posts and categories using flexible roles that you can define.

Alvaro Gómez

This plugin restricts access for Authors and Contributors so they can only see their own Media Library uploads.
This has two main uses: Make it easier for Authors to locate their own uploads when Media Libraries grow very big and prevent Authors from using or downloading media that belongs to other users.
Admins and Editors will still be able to see everyone’s uploads.

Restrict Media Library Access

Muy útil

This plugin works fine in WP 5.7.1 

It's just the example code from the official WP docs for the ajax_query_attachments_args filter, with a line added to check if the current user is an administrator. It's very simple.

There's no reason this plugin shouldn't work in an up-to-date WP installation

works in WP 5.7.1

Restricts access for Authors and Contributors so they can only see their own Media Library uploads.

Maven Member vs Restrict Media Library Access