Two unallocated spaces on new 4TB internal hard drive

WD Internal Drives Desktop & Mobile Drives
1

I just received a new WD Red 4TB internal hard drive with two unallocated spaces. I can create one healthy partition but cannot extend it to use the remaining space nor can I do anything at all with the second unallocated space.

I want one 4TB partition.

2

did you partition it GPT (GUID Partition Table) and not MBR ?

did you check your computer supports UEFI ?

3

What’s the size of the healthy partition? 3.638TB?