The GUID Partition Table (GPT) replaces the previous master boot record (MBR). GPT partitions can hold 18 exabytes compared to 2.2TB for the MBR.

A GPT partition (GUID Partition Table) is superior to an MBR partition because it allows for 128 partitions and supports partitions much larger than 2 TB (with each partition supporting up to 18.8 ...

For added security, Windows 11 will forgo the older MBR partition scheme and use GPT instead. That may require users to convert their older hard drives. Here is how to do it.

If you are not able to convert MBR to GPT, and get MBR2GPT failed - Causing backup/restore privilege Issues error, then see this post.

This post explains what is MBR (Master Boot Record), GPT (GUID Partition Table) and which technology is better for your SSD.

The new release is a Universal Binary and has support for GUID Partition Tables (GPTs), as used on Intel Macs, and including the ability to convert between.