It is nice to have more space for our file. But, is hard disk 4TB is compatible with your operating system?
Hard disk 4TB default will show for 2TB and the rest will showed as unallocated (if you use windows as operating system). If you want the hard disk with one partition, it can. Open Control Panel => Administrative Tools => Computer Management => Storage => Disk Management and choose the hard disk and Convert to Dynamics Disk… then format it as usual disk. And you will have hard disk 4TB with detected 3.63TB spaces.
Hope this help and sorry no pics, I forget to capture it :D.