I have a NAS and backup hard drives as well! I got the WD MyCloud for cheap on Amazon - 8TB. I love it for what it does. If you want an easy setup and management, I would go this route. But, I'm sure Synology and others have better "Pro" Features. Amazon also has a WD 2TB for 70$ right...
Are you running updated firmware? App? I got my system a couple weeks ago and have a narrow home with modem connected in my office at one end of my home. So, I have a mesh point in the center of my house and another one at the far end where my bathroom is (Main > Mesh > Mesh) I took out the...