format to 4 tb
appears as 2 tb.
I belive the issue that you’re experiencing with your 4TB WD drive only showing 2TB of usable space and it is likely due to the way the drive was formatted and partitioned. This can happen due to the difference between the capacity and the way the operating system reports storage capacity.
To resolve this, you can repartition and reformat the drive to utilize the full 4TB capacity., if you continue to have trouble, reach out to Western Digital support for further assistance. Proper drive configuration and management are important to ensure you can take full advantage of the storage capacity you’ve purchased.