I’ve seen many people have insane setups to download things automatically and NAS’ with tens of terabytes of capacity, which i don’t understand at all.
I have a 1 tb drive from 2013 of which I’m using ~850GB and most of the space is used by series i have already watched and haven’t bothered to delete.
What are you storing to need so much space and how are you finding so much good content that you actually want to save?
I have 50TB of capacity, 30TB used, for Movies and Shows (mostly movies). I get maximum quality 4K Blu-ray rips called Remuxes. For 4K they can be as large as 110GB each movie but never lower than 25GB.
Where I find it is private (torrent) trackers. These places are utopic is what they have available to download and organized to find everything super easy, and the trackers I’m with have a good community and we all talk and hang out in the IRC chat.