Backup - differential or incremental - always backs up all music

Every time I use the Windows backup utility, it backs up every music file on
my system, even though that file has already been backed up in the set.
This causes my backup to quickly mushroom into gargantuan proportions, as I
perform a backup every day. The documentation on Windows backup is sketchy,
and it doesn't say whether subsequent backups are differential or
incremental. I have a feeling that every time I play a music file, Windows
scans every file, and tries to update it with tags, thereby causing Windows
backup to think it's new or changed. In other words, it seems to be pretty
dumb about knowing what files have been changed, and errs on the side of
caution. Is there a way to make sure Windows doesn't perform such redundant
backups?

--
Michael

Maybe changing your music files to read only will work.

"Michael Ray Brown" <velcrofaceNoSpam@yahooNoSpam.com> wrote in message
news:ODxoBUUwIHA.4876@TK2MSFTNGP02.phx.gbl...
> Every time I use the Windows backup utility, it backs up every music file
> on my system, even though that file has already been backed up in the set.
> This causes my backup to quickly mushroom into gargantuan proportions, as
> I perform a backup every day. The documentation on Windows backup is
> sketchy, and it doesn't say whether subsequent backups are differential or
> incremental. I have a feeling that every time I play a music file,
> Windows scans every file, and tries to update it with tags, thereby
> causing Windows backup to think it's new or changed. In other words, it
> seems to be pretty dumb about knowing what files have been changed, and
> errs on the side of caution. Is there a way to make sure Windows doesn't
> perform such redundant backups?
>
> --
> Michael