Option to download unmodified files (for a backup) in automatic updater

Would be wonderful if we could have the option to download a package of the files that are modified (in an unmodified state) in the update process along with the option to download the package of updated files at the end.

Would make backups much easier and give us a package of the files that were changed to upload right away in case some error pops up (instead of having to reupload an entire backup).