G-Technology Thunderbolt 3 6TB G-DRIVE

The item is a, G-Technology Thunderbolt 3 6TB G-DRIVE External Hard Drive, Thunderbolt 3 & USB 3.1 Gen 1 - Silver, Product code: GT0G10491, I also believe it is known as a 0G05370 model. I need to know the physical hard drive within. Does it have either WD or G Techology HD, eg, WD PURPLE, ULTRASTAR DC HC 300 series / 500 series, WD BLUE, WD RED, or a WD GOLD to name a few. I have researching for weeks and can not match the physical hard drive that is inside with the external desktop drive model.