The difference between MBR and GPT
MBR
Since the early 1980s, the standard partition table format supports up to four primary partitions per drive and up to 2TB disks.
GPT
GPT is a subsequent MBR partition table format that supports up to 128partitions per drive and can partition a disk up to 18 exabytes.
Use MBR for disks smaller than 2TB
Use GTP for disks larger than 2TB
