Use Disk Management ( DiskMgmt.Msc ) and verify the drive's
structure is shown correctly. For removable drives it's best to
assign a mid-alphabet letter to them, such as L-P to keep lettering
assignments from being an issue.

"w4lla" <w4lla@discussions.microsoft.com> wrote in message
news:F7573E6D-902B-4AEB-807A-B28A5A00CB21@microsoft.com...
>I am having problems with my lap top and my 400GB external hard drive! I
>can
> see it in device manger but not in my computer!
>
> Please can some help
>
> W4lla