New WD Black 4TB HDD issues.

Hello,
I just finished upgrading my computer. I have a 4TB WD Black Hard drive and a WD SN750 SSD installed, first time using two drives, and first time using a SSD.

I installed new copy of Windows 10 on the SSD, and it shows as C: drive, and I intended to use the 4TB Hard Drive for everything else. However the HDD does not show up in Windows Explorer for me to save anything to.

The 4TB HDD drive does show up in my Asus bios, but not as a bootable drive, only the SSD and my CD/DVD drive show up as bootable.

The HDD shows up and passes all checks with Western Digital Data Lifeguard Diagnostics tool.
The HDD also shows up under Windows Device Manager, its says it is working properly and the best drivers are installed. Searching with Windows Update does not bring up any new drivers.
It also does show up under Disk Management, but not as a named drive or Volume, only a Disc #, with two Unallocated sections.

I have upgraded the Motherboard BIOS to latest non-Beta version, released November 2020.

Upon reading on WD website that their internal drives do not come pre-formatted, I proceeded to disk management to create a new volume, following their instructions How to Partition and Format a WD Drive on Windows and macOS

However, the drive already had a 50mb System Reserved Partition on it that I cannot modify, and two Unallocated Partitions, one is 2047.95 GB, the other is 1678.02 GB.
I am only able to make a New Simple Volume with 2047.95 GB partition, and right-clicking on the 1675.02 GB one only gives me the option to click Properties and Help.

The Disk Status is listed as Disk 1, Basic, 3726.02 GB, Online.
3726.02-2047.95= 1678.07 GB of unavailable space? Where is the remaining 274GB if the System Reserved is only taking up 50MB?

So it basically looks like I am only able to actually use a little more than 2TB out of my 4TB drive? What the heck did I pay the extra money for the larger drive for?

Is it possible to completely wipe/format this drive to make most of the space usable?


WD support has not responded yet in several days, nor as anyone on their forums, so I am posting here. Any help would be appreciated.


Current build:
New: Windows 10 Home 64-bit
New: Intel i7-10700K CPU
New: ROG Strix Z490-E Gaming Motherboard
New: WD Black 4005FZBX 4TB Hard Drive
New: WD Black SN750 NVMe 500GB SSD
New: Corsair Vengeance LPX 2x8GB 3200 MHZ DDR4 Ram
Old: Nvidia Geforce GTX 1060 6GB Graphics card
Old: EVGA Supernova G2 750watt Power supply

Bastet said:

If you haven’t formatted the drive & created those partitions then the seller has sent you a used drive imo..

I hope not, I bought directly from WD.

Bastet said:

Is it a new drive/recently purchased?

yes, bought this month directly from WD website. Date on the moisture bag says manufactured Dec 1st 2020

Bastet said:

A system reserved partition is usually added during Windows install afaik. Was the HDD connected while installing Windows? It may be it added the partition on the HDD.
I would clean the HDD drive using diskpart.

yes, the HDD was connected when I installed windows on the SSD.

There is a 505mb recovery partition in addition to the primary partition on the SSD. there is not a system reserved partition on the ssd.
I had not attempted booting without the hdd connected.
However, I have clicked on the hdd in the bios before, and it booted windows.