I-Should-Travel

I'm not anywhere close to the point where I'll be constantly transferring data. I'll be using it mostly as a plex server, not yet remotely for other people or myself either. Is the premium for NAS drives truly warranted for the average user? Or at that point, are NAS rated drives more just the only way to get drives over 5TB~ capacity in the first place?

https://www.amazon.com/dp/B00A128S24

Coax in wall -> Modem -> Router -> Internet jack of Switch 1 -> Any port of Switch 1 -> Internet jack of Switch 2

Will the connection between 'any port of switch 1' provide internet to the rest of the jacks on switch 4? I assume yes because any traffic will just go through that connection and then be handled by switch 2. Maybe some arguable congestion on that line, but this is for a small (read: apartment) home network that is hardly going to get blasted with bandwidth ever.