VAU23 You don't need nearly that much storage for Sims 4. Even with a giant pile of custom content and a serious backup-save-hoarding issue, I can't see how anyone would use a terabyte of storage just for this game. I mean, I guess it's possible if someone were to try hard enough, but in practical terms, you'll never get there.
For monitors, what do you think of this one (same model, black or white)?
https://www.newegg.com/msi-pro-mp275q-27-qhd/p/N82E1682447536
https://www.newegg.com/msi-pro-mp251w-e2-24-5-fhd-120-hz-ips-matte-white/p/N82E16824475450
It's reasonably-priced and has a reasonably-high refresh rate, and it's a little brighter than the entry-level IPS monitors.
These have faster refresh rates and are a little brighter:
https://www.newegg.com/acer-xv275u-vymipruzx-27-wqhd-170-hz-nitro-ips-black/p/N82E16824011465
This one has a higher refresh rate than the first two, the same brightness, and is larger if that makes a difference. The physical size won't affect performance; it's about personal preference only.
https://www.newegg.com/gigabyte-gs32q-32-qhd-165hz-oc-170hz-ss-ips-black/p/N82E16824012069
There are lots of options to choose from that are a little more expensive than these, so if none of these are what you want, let me know why, and I'll narrow the search. I only looked at Best Buy (no good options for a reasonable price right now) and Newegg because of the sheer number of options, but if you decide you want something specific, it would be easy to check other stores too.