I will try and explain this best as possible...
Drive 1 (win11) SSD installed via SATA
Drive 2 (Win 10) SSD installed via SATA
Drive 3 (backup drive) installed via SATA
I can boot and run Linux Ubuntu on my external case with all the other drives installed
I have another external drive with Mint and in the same external case computer will not even reach boot screen
Unhook all the other drives installed inside computer then Mint will boot
Drive 1 (win11) SSD installed via SATA
Drive 2 (Win 10) SSD installed via SATA
Drive 3 (backup drive) installed via SATA
I can boot and run Linux Ubuntu on my external case with all the other drives installed
I have another external drive with Mint and in the same external case computer will not even reach boot screen
Unhook all the other drives installed inside computer then Mint will boot