Remote Backup via FTP to Local

Hello,
I am looking for backup software to save my website to my computer via FTP. I have used Cobian, but the problem of Cobianis that, it downloads the whole site and then compares the files that were modified and to update my backup folder locally ...
It is not practical at all, if I have to change a file on the site. I wish it can download the changed file. I am looking for a backup software that compares the files to backup (modified file) directly on the site, and then downloads only those files changed.
Best regards.

Allway Sync allows you to backup via FTP.
For against, I do not know if it compares the file directly on the site.

I don't know if FTP is the right protocol here. I thought you needed a server that had an internet routable IP to access that?? I mean, a web server??

I'm thinking you need to remote into your lan via vpn or pcanywhere or something like that to access a node on your lan??

One way is to use MS' "scheduled tasks" to kick off a .bat file at a given time. Check out tools like lftp for Windows that you might reference in that .bat file.

Tools like rsync or scp are probably better for this sort of thing, though. Rsync would be a fantastic way to backup data files - and you can do so multiple times in a day without chewing up your bandwidth as it just grabs changes in files (though it might grab the whole file in a Windows system as opposed t oblock level changes in a Linux system). You would need to look into cygwin I believe.

Alternatively, you might also look up FileZilla Client (and lftp as Rog already mentioned), not sure how well it works through command line but I think it will let you synchronize and only get changed files.