Windows 10: 4TB NVME, Put windows on Only allowing 2tb

I recently got a 4tb NVME Western Digital Black which I used Acronis to move my bootdrive to but for some reason it is only allowing me to use 2tb of the drive while the remaining 2 tb is unallocated. How do I fix this?

:)

 

Disk Management shows new 4TB disk as 2TB despite using GPT

Thanks for the suggestion. I downloaded SeaTools for Windows, which listed my new disk as 2TB rather than 4TB. That wasn't much of a surprise, but what was unexpected was the indication that all three of my data disks are connected as SAS drives. Only the SSD used as my system disk is listed as a SATA drive. I never knew that I was using the SAS interface in my Dell workstation. Clearly, I need to have another read of the Dell user manual!

However, this does suggest another possible reason for my machine's inability to recognise disks over 2TB. The MPTBIOS that controls the Dell SAS Adapter has not been updated since 2008.

 

4tb Hard drives showing as 2tb

Microsoft Windows 10 Pro 64-bit (2009, 19042.985)

Version: 10.0.19042



I have 2 Seagate Barracuda drives that only show as 2tb.
They are gpt.
This is since using them in raid in nas.
tried everything in this thread
Disk Management shows new 4TB disk as 2TB despite using GPT
Drives are F & G in screenshot,i have 2 other 4tb drives that are fine.

 

If I have a 2TB D: secondary drive in in Win 11, can I replace it with a 4TB, or larger?

Currently I have a 2TB C: drive, and a 2TB D: secondary drive, both SSD devices.

Can anyone tell me how much larger a drive I can add as a D: drive?

4TB, 6TB, 8TB?

I'd be happy with 4TB, but can it be done?

Thanks in advance.