Free Web sites like yousendit.com and sendthisfile.com are specifically designed for sending huge files from one computer to another, without worrying about email file attachments or size limits.

On the Windows PC, zip up your files into a great big .zip file. Upload it to one of these free sites, and provide your Mac’s email address.

On the Mac, click the link that arrives by email—and, presto, that huge zip file gets downloaded onto your Mac. It’s free, there’s no file-size limit, and you can download the big file(s) at any time within three days of sending them. The only price you pay is a little bit of waiting while the stuff gets uploaded and then downloaded.