Another option is to try a internal disk drive instead of that external
drive for troubleshooting purpose.

"REW2705" <REW2705@discussions.microsoft.com> wrote in message
news:B581F1CA-AB0E-495D-8B12-8B7B647186D4@microsoft.com...[color=blue]
>I am using a laptop with Vista Home Premium. I am attempting to use the
>Back
> Up Files utlity to back up to a external drive attached to a XP Media
> Center
> Ed PC on my network. Sharing has been enabled on the drive, and I am able
> to
> write and read from the laptop with no problems. The drive does not appear
> as
> an option in the "On a hard disk, CD or DVD:" option, and when selecting
> the
> drive from the "On a network:" option, I am prompted for a user name and
> password. The drive is not password protected and I do not use user names
> and
> passwords on the XP PC. Is there any reason why I can not back up to this
> drive?? The common exceptions listed in the FAQ do not seem to apply to my
> case.[/color]