How I set up my own Google Photos using nothing but a Synology NAS

Google Photos is fantastic for backing up your devices to the cloud and saving memories for later enjoyment. The problem is it's owned and managed by Google, one of the largest tech firms in the world. That's perfectly fine for availability as there's hardly ever a time when Google Photos is unavailable due to a technical issue, but it means you're relying on the company to continue storing your media and protecting it against potential attacks. Not to mention there's always the potential for a free tier to be adjusted or removed altogether.