Solved! which brands of hard drives does HP fit in their HP ZBook 15u G3 Mobile Workstations

[PolarisVega]

a HP ZBook 15u G3 Mobile Workstation was returned from a local repair shop as damaged beyond repair after a fall. It came back without the ram modules(32Gig) and the broken hard drive which was returned to me is a HGST make. I doubt if it is the original drive. I had no success on HP's "customer support" website. I want my facts straight before I take on the shop.
part number: M6G49AV serial number: 5CG6144KBR

 

[penguintech]

in this model line, I have seen Seagate and HGST.

 

[PolarisVega]

Thanks penguintech for your reply, much appreciated.