As always, I only recommend products I personally use and love, or think my readers will find useful.
Get FREE Unlimited Photo Storage from Google!! Google Photos gives you a single, private place to keep a lifetime of memories, and access them from any device. They’re automatically backed up and synced, so you can have peace of mind that your photos are safe, available across all your devices. Store an unlimited number of photos (up to 16 megapixels) and videos (up to 1080p).
Google Photos app is available on all major platforms including Android, iOS, Mac, and Windows. Once setup, it will start backing up all media if your phone is connected to a WiFi network. You can also enable backups over cellular data but it will incur the regular costs charged by your network provider.