Archiving a Backup

[Otters]

Some of my Mail messages disappeared for no reason that Apple can find.

I'd like to keep the last SD backup I made before this happened in case anything else is missing, but would like to move it off its own partition on a FW drive and preferably store it with other files. Then I could continue to backup to that partition.

What would be the best way to do this (on 10.4.11)?

[dnanian]

You could "Backup - all files" to a sparse image stored on that other drive.