Can't format WD my passport

I just bought my passport and having around 4gb of data in HD. Now I want to partition the My passport so that I can use it to install windows in my other laptop.
I have followed Instructions to Format a Drive for Use with Windows or macOS tutorial and I opened Disk Utility. Next step is to click the ‘+’ button. But it is in disabled state now.

I didn’t setup any kind of security to My passport yet. And it is open. Format is ExFAT now. 1 TB is the total storage. Please help.

Hello asimkt,

Maybe you should try contacting WD’s Technical Support about this.

To Contact WD for Technical Support
http://support.wdc.com/support/case.aspx?lang=en