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From: Eli Zaretskii <e...@is.elta.co.il>
Newsgroups: comp.emacs,gnu.emacs.help
Subject: Re: Save copy of file in another directory
Date: Thu, 06 Dec 2001 11:35:03 +0200
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Eric Hobsbawm wrote:
> 
> I want to set up emacs so when I save a file in my home directory
> (C:\eric) I also want to save a copy on the other drive
> (D:\Backup\eric).
> 
> Ideally it should save it in the same relative place, eg save both to
> C:\eric\projects\matlab\flow\flow.m and
> D:\Backup\eric\projects\matlab\flow\flow.m, creating the directories
> if necessary.
> 
> I have no idea how to do this, so all help is very welcome.
> 
> Oh, I use emacs 20.7.1 on Windows NT if that matters.

This is much easier in Emacs 21.1.  There, you can set up a single variable
to the name "D:/Backup/eric", and all the backup files go into that
directory.