WD Green 4TB shows as 1.63TB

[EddieAdams]

The basics:

I’m using a Macbook Air running Windows 7 SP1 via BootCamp.

I bought a WD Green 4TB desktop drive and placed in an external WD MyBook enclosure that I’d been previously using with a 500gb drive.

I formatted the new 4TB drive using WD’s windows drive formatting tool.

And the drive only shows as 1.63TB total. No other space or partitions or anything.

I have tried converting the disk to GPT but that is not an option in any disk management system I have tried. That option is always greyed out.

There is no other partion to delete or remove or reduce in size.

I googled this for hours last night and found no solutions.

I’d appreciate any help.

[jubei04]

Hi Eddie, note that replacing the internal drive is not supported. To troubleshoot the drive, try to connect it directly to a computer motherboard and see if you can access the full capacity.