this way i get a size:
<?php $attachment_id = get_field('download');
$url = wp_get_attachment_url( $attachment_id );
$title = get_the_title( $attachment_id );
if (get_field('download')): ?>
<a href="<?php echo $url; ?>" ><?php echo $title; ?></a>
<?php
$file_size = $attachment_id; echo size_format($file_size, 2); ?>
<?php endif; ?>
but its not the size of the file it’s always about 1kb, i think it’s the size of the “ID” itself? i get the title with “get_the_title” but how do i get the size in MB?