Show only posts and media related to logged in author

 // Show only posts and media related to logged in author
   add_action('pre_get_posts', 'query_set_only_author' );
   function query_set_only_author( $wp_query ) {
     global $current_user;
     if( is_admin() && !current_user_can('edit_others_posts') ) {
        $wp_query->set( 'author', $current_user->ID );
        add_filter('views_edit-post', 'fix_post_counts');
        add_filter('views_upload', 'fix_media_counts');
     }
   }
// Fix post counts
   function fix_post_counts($views) {
    global $current_user, $wp_query;
    unset($views['mine']);
    $types = array(
        array( 'status' =>  NULL ),
        array( 'status' => 'publish' ),
        array( 'status' => 'draft' ),
        array( 'status' => 'pending' ),
        array( 'status' => 'trash' )
    );
    foreach( $types as $type ) {
        $query = array(
            'author'      => $current_user->ID,
            'post_type'   => 'post',
            'post_status' => $type['status']
        );
        $result = new WP_Query($query);
        if( $type['status'] == NULL ):
            $class = ($wp_query->query_vars['post_status'] == NULL)  ? ' class="current"' : '';
            $views['all'] = sprintf(__('<a href="%s"'. $class  .'>All <span class="count">(%d)</span></a>', 'all'),
                admin_url('edit.php?post_type=post'),
                $result->found_posts);
        elseif( $type['status'] == 'publish' ):
            $class = ($wp_query->query_vars['post_status'] == 'publish') ? ' class="current"' : '';
            $views['publish'] = sprintf(__('<a href="%s"'. $class .'>Publish <span class="count">(%d)</span></a>', 'publish'),
                admin_url('edit.php? post_status=publish&post_type=post'),
                $result->found_posts);
        elseif( $type['status'] == 'draft' ):
            $class = ($wp_query->query_vars['post_status'] == 'draft') ? ' class="current"' : '';
            $views['draft'] = sprintf(__('<a href="%s"'. $class .'>Draft'. ((sizeof($result->posts) > 1) ? "s" : "") .' <span class="count">(%d)</span></a>', 'draft'),
                admin_url('edit.php?post_status=draft&post_type=post'),
                $result->found_posts);
        elseif( $type['status'] == 'pending' ):
            $class = ($wp_query->query_vars['post_status'] == 'pending') ? ' class="current"' : '';
            $views['pending'] = sprintf(__('<a href="%s"'. $class .'>Pending <span class="count">(%d)</span></a>', 'pending'),
                admin_url('edit.php?post_status=pending&post_type=post'),
                $result->found_posts);
        elseif( $type['status'] == 'trash' ):
            $class = ($wp_query->query_vars['post_status'] == 'trash') ? ' class="current"' : '';
            $views['trash'] = sprintf(__('<a href="%s"'. $class .'>Trash <span class="count">(%d)</span></a>', 'trash'),
                admin_url('edit.php?post_status=trash&post_type=post'),
                $result->found_posts);
        endif;
      }
      return $views;
    }

   // Fix media counts
   function fix_media_counts($views) {
      global $wpdb, $current_user, $post_mime_types,  $avail_post_mime_types;
      $views = array();
      $count = $wpdb->get_results( "
         SELECT post_mime_type, COUNT( * ) AS num_posts
         FROM $wpdb->posts
         WHERE post_type = 'attachment'
         AND post_author = $current_user->ID
         AND post_status != 'trash'
         GROUP BY post_mime_type
      ", ARRAY_A );
      foreach( $count as $row )
				if ($count && $row != 0) {
        $_num_posts[$row['post_mime_type']] = $row['num_posts'];
    		$_total_posts = array_sum($_num_posts);
    		$detached = isset( $_REQUEST['detached'] ) || isset( $_REQUEST['find_detached'] );
				};
      if ( !isset( $total_orphans ) )
         $total_orphans = $wpdb->get_var("
            SELECT COUNT( * )
            FROM $wpdb->posts
            WHERE post_type = 'attachment'
            AND post_author = $current_user->ID
            AND post_status != 'trash'
            AND post_parent < 1
         ");
		if ($matches != 0) {
		$matches = wp_match_mime_types(array_keys($post_mime_types), array_keys($_num_posts));
    foreach ( $matches as $type => $reals )
        foreach ( $reals as $real )
            $num_posts[$type] = ( isset( $num_posts[$type] ) ) ? $num_posts[$type] + $_num_posts[$real] : $_num_posts[$real];
    $class = ( empty($_GET['post_mime_type']) && !$detached && !isset($_GET['status']) ) ? ' class="current"' : '';
    $views['all'] = "<a href='upload.php'$class>" . sprintf( __('Todas <span class="count">(%s)</span>', 'uploaded files' ), number_format_i18n( $_total_posts )) . '</a>';
    foreach ( $post_mime_types as $mime_type => $label ) {
        $class = '';
        if ( !wp_match_mime_types($mime_type, $avail_post_mime_types) )
            continue;
        if ( !empty($_GET['post_mime_type']) && wp_match_mime_types($mime_type, $_GET['post_mime_type']) )
            $class = ' class="current"';
        if ( !empty( $num_posts[$mime_type] ) )
            $views[$mime_type] = "<a href='upload.php?post_mime_type=$mime_type'$class>" . sprintf( translate_nooped_plural( $label[2], $num_posts[$mime_type] ), $num_posts[$mime_type] ) . '</a>';
    }
      $views['detached'] = '<a href="upload.php?detached=1"' . ( $detached ? ' class="current"' : '' ) . '>' . sprintf( __( 'Sin Adjuntar <span class="count">(%s)</span>', 'detached files' ), $total_orphans ) . '</a>';
    return $views;
    }
   };