GPT, in turn, replaces the clunky old MBR partitioning system with something more modern. It's called GUID Partition Table because every partition on your drive has a "globally unique identifier," or GUID — a random string so long that every GPT partition on earth likely has its own unique identifier. GPT doesn't suffer from MBR's limits.
Run the Disk Management utility from the Start Menu and view a disk’s properties to see if it uses GPT or MBR.
How to Check if a Disk Uses GPT or MBR, and Convert ... - How-To Geek
That's because UEFI uses the GPT partitioning scheme instead of MBR. It also boots in a more standardized way, launching EFI executables rather than running code from a drive's master boot record. UEFI can run in 32-bit or 64-bit mode and has more addressable address space than BIOS, which means your boot process is faster.
Are GPT partitions less likely to corrupt compared to MBR-based ones? The Answer SuperUser contributor mtak has the answer for us: According to the Wikipedia article on GUID Partition Tables, there is redundancy built into the GPT partition scheme. The GPT header is written at the beginning as well as at the end of the disk (see graphic below).
You must choose a partition style, generally GUID Partition Table (GPT) for modern computers running UEFI, or Master Boot Record (MBR) for older legacy systems. It is vital to match the partition style of your old drive to avoid boot issues later.
How to Fix No UEFI (MBR Instead of GPT) Windows 11 requires UEFI. Some older computers offer both modes: UEFI firmware or a traditional legacy BIOS. If you are currently using a "traditional" MBR partitioning setup but your PC does offer UEFI as an option, you will have to switch to a GPT partition table to use UEFI. There are several ways to ...