Do these backup files actually have a .pst suffix or something else?

"Brian" <Brian@discussions.microsoft.com> wrote in message
news:117CC243-1DA3-449D-A35D-F71B97B191E6@microsoft.com...
> It's a 15 gig partition. However, once I reinstalled Vista it completely
> reformatted the harddrive, partition and all. When I reinstalled Vista it
> automatically created another 15 gig partition where my new backups are
> being
> placed.
>
> "Gordon" wrote:
>
>> "Brian" <Brian@discussions.microsoft.com> wrote in message
>> news:5D8DD68E-C1CC-44E0-9035-2FBDB725A99C@microsoft.com...
>> >I set Vista to backup my system weekly. It put the backup files on an X
>> > drive while Vista remained on the C drive.
>> >
>>
>> Is the "X" drive a separate physical disk, or is it a partition of the
>> one
>> HDD?
>>
>>