I'm aware of nothing in Google's terms which isn't in the terms of every other user-generated-content service that has lawyers on staff. In order to make copie

I'm aware of nothing in Google's terms which isn't in the terms of every other user-generated-content service that has lawyers on staff. In order to make copies (distributed storage, network traffic, etc.) and show copies to people -- including you, or anyone you choose to share a file or post with -- they basically have to have a license from you, or they're potentially on the wrong side of copyright law.