I finally have sufficient HDDs to transfer over backups. Can I change from mbr to gpt on two of the drives to avoid transferring 5GB of data just to change the disc to gpt, without any data corruption ...

Many high-end games, professional software, and cloud security applications now require Secure Boot and TPM 2.0 features, which are only supported when the system disk uses the GPT partition format.

The format used to define the hard disk partitions in computers with UEFI startup firmware. The GUID Partition Table (GPT) replaces the previous master boot record (MBR). GPT partitions can hold 18 ...