In mine:
Everyday setup. 256 M.2 for linux, 120 Sata for W10, 1TB for files.
Encoder/Video PC. 256 M.2 W10, 3TB for media/Scratch disc.
Laptop 256 M.2 for W10, 160GB for the odd files as I hardly use it.
a 3TB backup for completed projects & media.
3 500GB lying spare from Nephews old builds I use for W10 backup of the above & Dad's PC. A 640GB that's 12 years old that may still have my nephews steam games on.
A 1TB 2.5" that I backed up my media onto, always a good idea to keep 2 backups.
Couple of old 120Gb SSDs that could be close to wearing out.