i use free hosting option of google sites.

You can also get two gigs free on dropbox, put files in your public folder, and share direct links to those. 

I suspect google drive and skydrive are also options. 

There are no ads involved in the dropbox or drive systems because there is no web page.

My google site has web pages too but still no ads. All free.

Some people have argued that my site is not free because of making people see ads. These individuals have some sort of mental disorder. There are no ads on google sites except what you decide to put there. I do not put any ads in mine.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)