Remember last time, I told you my tale of woe? I also promised to tell you a bit about OneDrive. This isn't a push toward them, I don't get any sort of kickback, but it's a FREE service from Microsoft, that until that day, I never really took advantage of.
Many writers use Google Docs. I do not, for anything important. In fact, I admit it, I had an internal freak out when someone beta read for me and uploaded it on Google Docs, with an open URL. Why? Well, because my teen is ridiculously smart with computers (didn't get that for me, haha!) and has explained just how unsafe that is. Also, as a book editor, I've had files completely be deleted I was working on, when the author made a mistake. They couldn't be recovered, and neither was my time and effort. I had to start all over again, double speed to make the deadline.
Nope, Google Docs is not for anything important. OneDrive though, you get a few free gigs of space, and you can use it to save photos, etc. I pay a little extra and also use it to save my writing. Then, as I'm working, it's backing up (though this paranoid self is also clicking that save button every page or so) and then, if I need to, I can access it though the web on any computer.
Handy, huh? While I hope that you never, ever, go through something like I did, computer woes happen. A sweet writer I know recently had her hard drive fail...along with her work. Thankfully, someone was able to recover it off the hard drive, but for a while, it looked like they wouldn't be able to.
When it comes to your hard work, multiple backups is the way!