Both of these services (GMail and Wordpress) don’t provide free file storage. The first is a mail host and the second one is a blog host, yet we can upload files there, but we are faced every day with the risk that our files get deleted as it is not allowed to use them as file repositories.

However, if you still looking for a “piece of mind”, you should certainly use the “new” (it depends where you live in fact) MS Skydrive (5Gb of free storage, 50Mb file size limit) : http://skydrive.live.com, Microsoft being behind it …