Archivist here. Google is not an archive. Neither is Tumblr or Flickr or any other platform that might delete your content at any time. They're companies and it's their job to make money. This is why my profession exists. We don't make money, which is why we're not well funded, but we have a whole lot of training, technical knowledge, and professional ethics around saving information and making it accessible. If you want to preserve your records, talk to an archivist because you can't assume some faceless corporation will do it for you.