Half Of 5tb Samsung D3 Showing As 'unallocated'

I have a Samsung 5TB D3 external HDD. Something got screwed and it ended up as a RAW disk. I've managed to get it back to showing in W10 Disk Management as
Disk 2
Basic
4657.53 GB
Online
PARTITION 1 ?
N:
2048.00 BG NTFS
Healthy (Prmary Partition)
PARTITION 2 ?
2609.53 GB
Unallocated

I can create / delete files on the N: drive.
Can anyone tell me how I can merge this unallocated space into the N: drive? Windows 10 Disk Management won't let me do anything with it.

Thank you.

 

Can you confirm whether or not your Windows 10 OS is a 64bit system, and can you give the brand name and exact model of your system and whether its a laptop or PC.

 

Windows 10 64 bit. The D3 is currently connected to a Dell XPS15 Laptop. I should add that there is nothing on the N: drive that I can't recreate easily.

 

Do you want it to be one 5TB partition? If you do, in Disk Management, right click on each partition and select Delete Volume then confirm. When the entire disk shows as unallocated, right click on it and select Create new simple volume and proceed from there.

 

Excellent. Got it back.
Thanks for your help