UEFI uses GUID Partition Table
Advantages
The interface defined by the EFI specification includes data tables that contain platform information, and boot and runtime services that are available to the OS loader and OS. UEFI firmware provides several technical advantages over a BIOS:
Ability to boot a disk containing large partitions (over 2 TB) with a GUID Partition Table (GPT)
Flexible pre-OS environment, including network capability, GUI, multi language
32-bit (for example IA-32, ARM32) or 64-bit (for example x64, AArch64) pre-OS environment
C language programming
Python programming using Python interpreter for UEFI shell
Modular design
Backward and forward compatibilityDisk device compatibility
In addition to the standard PC disk partition scheme that uses a master boot record (MBR), UEFI also works with the GUID Partition Table (GPT) partitioning scheme, which is free from many of the limitations of MBR. In particular, the MBR limits on the number and size of disk partitions (up to four primary partitions per disk, and up to 2 TB (2 × 240 bytes) per disk) are relaxed. More specifically, GPT allows for a maximum disk and partition size of 8 ZiB (8 × 270 bytes).