Many high-end games, professional software, and cloud security applications now require Secure Boot and TPM 2.0 features, which are only supported when the system disk uses the GPT partition format.

Definition of MBR & how to fix missing or corrupt MBRs A master boot record (often shortened as MBR) is a kind of boot sector stored on a hard disk drive or other storage device that contains the ...

Or, maybe the easiest thing of all would be to just keep the 2TB plugged in as the "backup" OS drive, and just make the 4TB drive a pure data volume? Wipe it so there are no boot files at all and just ...