My Hard Disk is not showing up in my computer

I am using WD Elements for the past two days it is not showing up in my computer I have checking in disk management still no go need help

Rameez,

I would recommend testing the device with Western Digital Data Lifeguard Diagnostics for Microsoft Windows after changing the USB cable and the power adapter.

http://wdc.custhelp.com/app/answers/detail/a_id/940/

If the device is still not recognized or if it fails a diagnostics test, then unfortunately the device may need to be replaced under warranty.

http://wdc.custhelp.com/app/answers/detail/a_id/8/