External USB Hard Drive doesn't show up in My Computer

Hello,
My External USB Hard Drive doesn't show up in My Computer Win 7 64bit.

I've Western Element 1Tb . When I first plugged it in, it worked normally. But due to my over-excitement, I copied too much files at the same time and it wasn't working anymore. I regretted doing this immediately.

I have searched on the internet to find some solutions but all of them didn't work. I've checked the Computer Management, Disk Management, but nothing about my External HD showed up. In the notification area, my laptop still detected it and I can removed it properly [even though i can't use it at all].

I tried to connect to other laptops but in vain

Then, I tried to connect my brother laptop " mac " but also in vain .

I don't know what to do anymore. Please help me.





1. Click Start and type Diskpart in the search box.
2. Right-click diskpart in the search results > click Run as administrator.
3. Once diskpart loads type list volume, press enter.

my external hard doesn't exist