Before booting from your USB, physically disconnect the SATA or power cables from your secondary hard drives. If they aren't connected, the installer cannot touch them.
Your other drives (Games, Photos, Backups) will appear in this same list. As long as you do not delete or format the partitions associated with those drives, their data remains 100% intact. The Risks: Where Things Can Go Wrong does clean install wipe all drives exclusive
Sometimes, users realize their files were only on the desktop (C: drive), which is wiped. Even if the secondary drives are safe, your primary user profile data is gone. How to Ensure "Exclusive" Wiping Before booting from your USB, physically disconnect the
Run the clean install on your lone remaining SSD. Before booting from your USB
