Is this a good backup strategy for a drive with Logic projects on it ?

Let's say you build on a LP9 project, that could be editing regions on the arrange window, adding/ deleting plugins, and saving the project under the same name. Those edits are stored in the project file and now the session is different than the one on the backup disk. Is it a good idea to have Carbon Copy Cloner archive the older project into a seperate folder and copy the newly edited version into the same project folder replacing the older version ? Or re-save the edited project (which I do by habit) on the work disk as a new name to reflect that it is a new version and now this new version will be cloned to the backup. But what if you delete digital audio off the work disk either on purpose or accidental, should the backup task also delete that audio from the backup drive or just move it to an archive folder for just in case down the road ? I am trying to design a new scheme where every day when I leave my studio a Macbook pro and my logic work disk goes with me leaving behind the daily incremental backup. Two events are my concern, the first is while away from studio I might edit or add to a logic project and want that work to be automatically backed up when I get back to studio and dock the laptop. Second if the studio burns down while I'm gone, I will have lost no data because the work drive is in my possesion. I think CCC is a good choice to manage my new back up scheme. Anybody have comments or suggestions ? Thanks much appreciated.

One way of making it more robust would be make a copy on DVD or BluRay, as I have read that several professionals do, for long term archiving, but this might be seen as too much of a *** for a small/non-professional catalogue.
Is one of the hard drives in a RAID setup? This would increase the safety factor and mean that it would take a three fold failure for pictures to be lost. Additionally, the use of professional quality hard drives built for a hard life in NASs etc,like the WD Red Pro, would give a meaningful increase in life expectancy over consumer level disks.

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