custom-upload-dir.php

<?php

/*
 * This file is just an example for a woocommerce issue
 */

add_action( 'plugins_loaded', 'maybe_custom_upload_dir' );

/**
 * under some circumstances, we need to move the upload dir
 */
function maybe_custom_upload_dir() {
	if (1) { //if we need to move the upload dir
		add_filter( 'upload_dir', 'filter_upload_dir' );
	}
}

/**
 * return the new upload dir path
 *
 * @param $dirs
 *
 * @return mixed
 */
function filter_upload_dir($dirs) {
	$dirs['path']    = '/mynew/upload/path';
	$dirs['url']    = 'www.mysite.com/mynew/upload/url';
	$dirs['baseurl']    = 'www.mysite.com/mynew/upload/baseurl';
	$dirs['subdir']    = '/mynew/upload/subdir';
	$dirs['basedir']    = '/mynew/upload/basedir';
	return $dirs;
}