FTP to database server to get backup file

I made a backup of my SQL database. How can I ftp to the server where the .bak file is at to download that backup? The file path is like this:
D:\DBBackup\UserDb\..\..\...bak

 

It will be in your webspace _backup directory.

 

Thanks but how do I get to that? When I FTP in to my regular website server I don't see a _backup directory. Is there a place I should be looking for FTP details for my database server?

 

...On some FTP clients you have to backup, climb, back above the site root to see it.

 

I tried that originally but it won't let me go up from the main directory. Any other suggestions?

 

...I'd suggest using Visual Studio, if you don't have it download the free version.
With VS the folder will show.
If you have Expression Web v4 the FTP tools in it are awesome.