I follow the common practice of the 3-2-1 backup strategy with our data at home. In short, the rule is **three** copies of data over **two** different types of media, with **one** copy of the data being off-site. Since media types are not really common practice anymore (though I do want to back everything up to tape one day, I think it'll be fun), I'm substituting devices for my implementation. [Veeam](https://www.veeam.com/blog/321-backup-rule.html) and [Backblaze](https://www.backblaze.com/blog/the-3-2-1-backup-strategy/) both argue that Cloud availability counts as a type of media, but my flowchart below was already getting too complicated to want to add more arrows. ![[Backup Strategy.png]] I also went beyond the recommendations by adding an external drive which is air-gapped until my backup process runs. The problem with that is that I do need to plug it back in and make sure it's mounted manually. [Duplicati](https://github.com/duplicati/duplicati) is a great backup client with wide compatibility. I use it to interface my main NAS to my other backup solutions, Backblaze and Synology. Restoring from backups is incredibly easy too, which I learned when I screwed up an [Immich](https://github.com/immich-app/immich) update which deleted content from my mounted volumes. That's basically the worst case scenario for family photos! They were restored within an hour thanks to how user-friendly Duplicati's interface is. I bet my non-tech family members would be able to restore if necessary, which is the overall end goal of my setup. As far as timing and quantity of backups, I'm limited by budget and available storage. Constraint breeds creativity, and I'm pretty happy with what I've come up with here. Of course, if you think there are improvements I can make, I welcome your opinion. A potentially controversial point I want to bring up: RAID technically doesn't count towards data redundancy. In most enterprise scenarios, RAID is implemented for uptime reasons, and is never considered for data. This of course, is in my experience and what I've learned from my superiors. For this reason I no longer consider it as a core part of my backup strategy, though I do have RAID 5 implemented on my NAS. My Synology NASs (not all included in this diagram) operate with Synology's Hybrid RAID, or SHR. That's mostly due to buying refurbished drives and wanting more experience with a wider variety of solutions. Disclaimer: I'm aware that posting this online gives bad actors a free meal ticket by seeing how deep they need to infiltrate, for example to encrypt all my data to extort. I've taken appropriate consideration before uploading this information for public digest. However, if this isn't enough information for you and you'd like more, go check out my [[Home Network Diagram]].