Tips on Customizing Folders – Unlimited Folders to Organize Media Library Folder, Pages, Posts, File Manager

How to Hide Folders Admin Menus

function plt_hide_folders_menus() {
	//Hide "Post Folders".
	remove_menu_page('edit.php?post_type=post&type=folder');
	//Hide "Media → Media Cleaning".
	remove_submenu_page('upload.php', 'folders-media-cleaning');
	//Hide "Media Folders".
	remove_menu_page('upload.php?post_type=attachment&media_folder=');
	//Hide "Page Folders".
	remove_menu_page('edit.php?post_type=page&type=folder');

	//Hide "Folders Settings".
	remove_menu_page('wcp_folders_settings');
	//Hide "Folders Settings → Folders Settings".
	remove_submenu_page('wcp_folders_settings', 'wcp_folders_settings');
	//Hide "Folders Settings → Recommended Plugins".
	remove_submenu_page('wcp_folders_settings', 'recommended-folder-plugins');
	//Hide "Folders Settings → Upgrade to Pro".
	remove_submenu_page('wcp_folders_settings', 'folders-upgrade-to-pro');
}

add_action('admin_menu', 'plt_hide_folders_menus', 10001);

Where do I put this code?

How to Hide Folders Meta Boxes

function plt_hide_folders_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Folders" meta box.
	remove_meta_box('post_folderdiv', $screen->id, 'side');
	//Hide the "Replace Media" meta box.
	remove_meta_box('folders-replace-box', $screen->id, 'side');
	//Hide the "Change file name" meta box.
	remove_meta_box('folders-replace-file-name', $screen->id, 'side');
	//Hide the "Folders" meta box.
	remove_meta_box('folderdiv', $screen->id, 'side');
}

add_action('add_meta_boxes', 'plt_hide_folders_metaboxes', 20);