Hi, I have this configuration for simple storage (movies, music, photos, etc...). For the installation of games and operating system I already have first a Samsung 980 PRO 2TB, for more games another Samsung 970 PRO 1TB, and I also have another NVME for games, a Sabrent 512 GB.
For storage I came from a RAID 0 of 4 Seagate mechanical disks of 2TB in total, it added the same storage as now but made a lot of noise, you know how HDD mechanical disks sound. My PC is a tomb and I have plenty of storage for my personal stuff!