[Gary MichaelSupport Manager]

Ah, my apologies for that. We just released an update that made changes to this filter, so here’s a revised snippet:

add_filter( 'syncs3_merge_tag_presigned_link_time', 'my_syncs3_merge_tag_presigned_link_time', 10, 2 );
function my_syncs3_merge_tag_presigned_link_time( $time, $args ) {
	return '+1 week';
}