It’s easy to add another drive to your NAS (not exactly the easiest given the rising cost of SSDs), but it’s not the upgrade you think it is. A lot of us keep beefing up the hardware without thinking about the backup strategy at all. Setting up RAID is as far as most people go when it comes to backups, but to be clear, RAID is not a backup. Sure, it provides some level of protection in case of drive failure, but it won’t help in situations like a power surge or a natural disaster. The best NAS upgrade you can make is a proper backup strategy that actually protects your data.

You don’t need a backup plan until you do

It won’t be necessary, until the day it is

A NAS without a solid backup plan gives you a false sense of security. See, a device like a NAS improves storage, convenience, and maybe even redundancy if you’re using RAID, but it does not automatically mean your data is safe. RAID only protects you from a drive failing. It does nothing against accidental deletion, file corruption, malware, or ransomware. If something goes wrong, that mistake or attack gets replicated across the array instantly.

A proper backup plan, on the other hand, assumes things will go wrong and prepares for it. That usually means following something like the 3-2-1 rule, which is three copies of your data, on two different types of storage, with one copy stored offsite. Without that, your NAS is just a single point of failure with extra steps.

Not everyone has the resources to implement this, but you should definitely do it for important data. The best way I can explain it is this: if the data is something you can easily reacquire, the 3-2-1 method is not necessary. For media you can never recover, though, the 3-2-1 method is essential. Think along the lines of pictures of your grandparents that you do not have original copies of, voicemails from loved ones who have passed that you have kept around, or that video of your kid’s first steps.

There is also the human factor. Most data loss happens because of simple mistakes like deleting the wrong folder or overwriting files. If your NAS is your only “backup,” you have no way to recover from that. Versioned backups or snapshots solve this, not bigger drives. Then there is ransomware, which is becoming more common even in home setups. If your NAS is connected and writable, it can get encrypted along with your main system. A proper backup setup keeps at least one copy isolated or immutable, so it cannot be touched.

Setting up the right backup strategy

The 3-2-1 approach matters

Once you understand why the 3-2-1 approach matters, the next step is actually putting it into practice without overcomplicating things. At a basic level, your NAS remains your primary storage, but it should not be the only place your data lives. You need a second local copy and a third copy that lives somewhere else entirely.

For local backups, the simplest option is an external hard drive connected directly to your NAS. Most NAS systems let you schedule automatic backups to external storage, so this can run quietly in the background. If you want a more robust setup, a second NAS in your home network works too, but for most people, that is overkill.

The offsite copy is where cloud storage comes in, and this is the part people tend to skip. You do not need to upload your entire NAS to the cloud, especially if you are dealing with terabytes of media. Focus on your irreplaceable data. Services like Google Drive, Dropbox, or Backblaze are popular because they integrate well with most NAS systems and can run continuous or scheduled backups. If you want something more NAS-focused, many brands also support direct cloud sync with providers like Amazon S3.

Once your storage layers are in place, automation is what makes the whole thing actually work. Backups should run on a schedule without you having to think about them. I automated my entire backup strategy with Zerobyte and a cron job. Zerobyte does not reinvent how backups work. Instead, it wraps Restic in a way that makes sense for how you actually run your gear today.

Set your NAS to handle daily or weekly backup jobs depending on how often your data changes. At the same time, enable snapshots and versioning so you are not just backing up files, but also keeping older versions. This is what saves you when you overwrite something or need to roll back to an earlier state.

Finally, make sure at least one of your backups is not constantly writable. This could mean using immutable backups, versioned cloud storage, or even a drive that is not always connected. If something compromises your main system, it should not be able to touch every copy of your data. Once you set this up properly, your NAS stops being a risk and starts behaving like a reliable part of a larger system.