Is my Hard Drive using MBR or GPT partitions

furulevi

MBR = Master Boot Record
GPT = GUID Partition Table (GUID = Globally Unique Identifiers)

MBR disks use the standard BIOS partition table;
GPT disks use Unified Extensible Firmware Interface (UEFI).

GPT disks allow more than 4 primary partitions on a hard disk.
Hard Disks larger than 2 terabytes require GPT partition style!