Now more and more people seem to assume that your data will only be on a remote site, and will not be on your computer at all. They assume that in order to "start a family tree" you need to subscribe to some or other company like Ancestry.com. It seems not to occur to many people that it is even possible to "start a family tree" using your own software on your own computer.
So now the danger is reversed. In the past you were advised to "keep a backup in the Cloud, just to be on the safe side." But how safe is that? How safe is your data in the cloud?
The recent closure of YahooGroups shows that it is not at all safe. See this article: The Old Internet Died And We Watched And Did Nothing:
Most likely, you have some photos that are lost somewhere, some old posts to a message board or something you wrote on a friend’s wall, some bits of yourself that you put out there on the internet during the previous decade that is simply gone forever.
The internet of the 2010s will be defined by social media’s role in the 2016 election, the rise of extremism, and the fallout from privacy scandals like Cambridge Analytica. But there’s another, more minor theme to the decade: the gradual dismantling and dissolution of an older internet culture.
This purge comes in two forms: sites or services shutting down or transforming their business models. Despite the constant flurries of social startups (Vine! Snapchat! TikTok! Ello! Meerkat! Peach! Path! Yo!), when the dust was blown off the chisel, the 2010s revealed that the content you made — your photos, your writing, your texts, emails, and DMs — is almost exclusively in the hands of the biggest tech companies: Facebook, Google, Microsoft, Amazon, or Apple.
The rest? Who knows? I hate to tell you, but there’s a good chance it’s gone forever.Though that article does not mention any specific genealogy sites, the principle is the same. And there were numerous family history groups on YahooGroups where people shared their family history data and their research, and advised each other on sources and resources. And now it's going, going, gone.
So if you want to "start a family tree", don't ask which is the best web site to do so. You don't need to subscribe to a web site to start a family tree! Ask rather "Which is the best family tree software for my computer and operating system?"
At the time of writing my recommendation for genealogy programs is Rootsmagic, or Legacy.
By all means back up your data in "the Cloud", but keep your primary data on your computer at home, where you can control it.