3 internal hdd's security


I’ve 3 internal ssd’s in my pc , 2 with data , 1 with qubes os.
If i start qubes os in bios. can the other ssd’s compromise qubes os while its booting?

I’ve read that usb sticks that are plugged into the pc while booting qubes os can compromise the os.
But is it different with internal ssd’s? because i dont boot the ‘data ssd’s’ from bios.

If they’re just data, then you’re safe. But, if you access them from Qubes OS, then there’s security risk. So, you want to access data from those 2 SSDs via disposableVM, different one for each data SSD.