Try Google Takeout to Back Up Your Google Photos

If you want to download and back up all those pictures on Google Photos over the years, try using Google Takeout. It's a lot faster than backing up manually, especially for people with huge batches. Google Takeout allows you to see the data you've given to Google in other areas too, like Google+ (rest in peace). It's important to back up from time to time, as being locked out of your Google account would be a nightmare. There's also an "Ask the Tech Guy" episode where Leo goes into this topic...check it out!