Zend certified PHP/Magento developer

Moving from HDD to SDD – facing some issues (GPT protective partition)

I am trying to move my pc from old HDD into new SSD
I put the new SSD in , installed windows 10
Then I connected the old HDD into the new windows using USB 3 cable and external enclosure, but Disk Management shows (GPT protective partition)

What is this GPT protective partition?
I have a backup but is there a way around this?

Thank you!

Disk Management Drive