Unified Extended Firmware Interface (UEFI) must be enabled in BIOS if you plan to use a bootable hard drive that is 2 terabytes or larger. This is not a requirement for drives that will be used for storage purposes only.
To enable UEFI:
- Press F2 during startup to enter the BIOS setup.
- Go to the Boot menu.
- Set UEFI Boot to Enable.
- Press F10 to save and exit.