Hard drive with unallowaded space unable to create new volume.

Mao___

Prominent
Jun 21, 2017
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I have a 3tb hard drive that I formatted using an older machine. Now only 2 tb of it i can touch the other almost 1 tb worth of storage is unallocated and i can not create a new simple volume out of it. Is there any way that i can reverse the format so I can reformat it on a newer computer. I did a little digging and it said that is probably because of the old computer restriction that only able to handle 2 tb storage. So im trying to find a way to reverse it.

Any help is greatly appreciated,

Thank you :)