Check how much of that stuff is actually needed to physically back up. Odds are it’s on the cloud already. I got a house calls for this kind of thing a few times a day and almost always the answer is "your Apple/Google/Microsoft storage has all your pictures and videos already.

I get people that ask me about setting up network storage arrays pretty often, but almost none of them want to go through with it.

I don’t know what your time is worth, and I would still set something up just because I felt like it or was curious, but almost nobody needs a home network storage system. Just figure out what people need to sync, set it up, and plug a hard drive into your router. Odds are once you try to figure out what they are trying to sink, you’ll realize that it already has automatically synced to their cloud storage.

If you really want to do it as a project and are near Maryland, I will give you some closed box Network storage arrays from 2012 with hundreds of terabytes between them in unused fiber optic hard drives.

Rarely. And not for international organizations with no relevance in the usa. You didn’t know what you are talking about .