I added a WD 4TB external HD. I wanted to partition it into two drives using windows 10 disk management. I was able to create

[wblackfin]

Can't make a volume with unallocated space on new 4TB HD using windows 10

 

[Boogieman_WD]

Hey there, wblackfin.

Do you get any errors when you try to partition and format the drive? Would you please post a screenshot of what you see in Disk Management about the HDD and its partitions (you can use imgur.com to upload the image)?
The drive should be initialized by using GPT and not MBR. If it's the other way around, I'd suggest that you reinitialize it and try to repartition it again afterwards. Here's a tutorial on how to initialize a drive: How to initialize or write a signature to a secondary hard drive or Solid State drive in Windows and on how to partition and format it: How to partition and format a WD drive on Windows and Mac OSX.

Hope that helps. Please let me know how everything goes.
Boogieman_WD

 

[wblackfin]

Hey there, wblackfin.

Do you get any errors when you try to partition and format the drive? Would you please post a screenshot of what you see in Disk Management about the HDD and its partitions (you can use imgur.com to upload the image)?
The drive should be initialized by using GPT and not MBR. If it's the other way around, I'd suggest that you reinitialize it and try to repartition it again afterwards. Here's a tutorial on how to initialize a drive: How to initialize or write a signature to a secondary hard drive or Solid State drive in Windows and on how to partition and format it: How to partition and format a WD drive on Windows and Mac OSX.

Hope that helps. Please let me know how everything goes.
Boogieman_WD

Thanks for your reply. There are no error messages. I was able to partition and format one section. The other section is unallocated and if I right click on it or go to actions in the menu all the volume tasks are grayed out and not available. Even If I right click on the formatted volume the option to extend it is not available. At this point I would be happy to remove the partition and use the whole disk as a single volume. I uploaded a screen shot to imgur.com- http://i.imgur.com/YHExb3Y.jpg Disk 2 is the WD 4TB in question. Thanks for any help you can provide

 

[Boogieman_WD]

Well it really seems like the drive has been initialized by using MBR (just for clarification MBR and GPT are different partition table formats.). Backup the data you have on that drive and then delete this partition (click with the right-mouse button and select "Delete Volume") so that both partitions have unallocated space. After that click with the right-mouse button where it says Disk 2 and select "Convert to GPT". This should fix the issue. After that you can partition and format the drive as you see fit.
The reason for this to happen is that MBR has a limitation of 2.2TB, which is 2048GB actual storage capacity (exactly like in your case). On the other hand GPT has no such limitations regarding the drive's overall capacity and you should be able to use the whole space.

Please keep me posted.

 

[wblackfin]

Well it really seems like the drive has been initialized by using MBR (just for clarification MBR and GPT are different partition table formats.). Backup the data you have on that drive and then delete this partition (click with the right-mouse button and select "Delete Volume") so that both partitions have unallocated space. After that click with the right-mouse button where it says Disk 2 and select "Convert to GPT". This should fix the issue. After that you can partition and format the drive as you see fit.
The reason for this to happen is that MBR has a limitation of 2.2TB, which is 2048GB actual storage capacity (exactly like in your case). On the other hand GPT has no such limitations regarding the drive's overall capacity and you should be able to use the whole space.

Please keep me posted.

Thank you! Your recommendation worked fine.

 

[Boogieman_WD]

I'm glad I was able to help.

Cheers!