Having trouble with WD 500 GB external after using diskpart clean

After trying to use the diskpart to clean and then allocate a partition on my External HDD that ended up not working, now I can't get the drive to load any of the data I did store on it before. (Part of the 500 GB HDD is set for use with 360 but only 16GB). Now I can't get the drive to load other than when in the Computer Management>Disk Management and it shows up as Disk 1 but unallocated. I attached a screen shot of the Computer Manager.

Thanks for the help!
Army Strong!

Also Disk 1 is the external HDD

Screen Shot of Device Manger

So what exactly are you trying to do ?

Right click on it and make your partition or partitions.

Looks as though you wiped the whole thing.

AddRAM said:

So what exactly are you trying to do ?

Right click on it and make your partition or partitions.

Looks as though you wiped the whole thing.

When I try and right click to assign it a letter I don't get the option. I'll take a screen shot of what is available. And if I did wipe it, is there anything I can do to fix it?