this post was submitted on 18 Apr 2026
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I'm asking as a genuine question, where or how should people backup large datastores? Also what counts as too large? I've heard Backblaze doesn't cover NAS so i wouldn't be able to backup my 2TB zfs RAID, but like is that too much?
I want to do 3-2-1 for my homelab to preserve all pictures in my immich and the backups of my LXCs and VMs, but I'm just not sure how to go about it, and I was considering archives of those files + backblaze...
A second offsite NAS with your friend? That's what I did when I grew out of my old synology. My new NAS capacity is noticeably impacted by things like frequent local snapshots but I don’t need to back those up remotely and it saves space.
Local tape. If you need offsite, rotate tapes. If you need cloud, Amazon Glacier or equivalent (which are backed by tape, I assume).
Tape drives are expensive as fuck though.
Before the storage wars it was cheaper to just build a second shitty NAS and backup there
Don't trust backblaze or any service that claims "unlimited".
The overwhelming feedback I've seen is to "KISS" and use some combination of restic/borg/kopia and rclone to sync data or local backups to cloud storage like https://www.hetzner.com/storage/storage-box/.
Restic/borg are more for whole system backups, where kopia is more for data (a central kopia server/repository can deduplicate and version data from multiple machines). Rclone is good for syncing local backups to cloud services, or perhaps e2ee synchronisation between machines (though it doesn't do versioning and multiple machines will cause problems).
This is the most flexible, long-term, as you can just update the storage backend and transfer or re-upload everything as necessary.
For a NAS, you can use Backblaze B2, but they certainly aren't the cheapest. B2 doesn't have the limitations that the personal and business plans have, but you pay by the TB.
There are lots of cloud backup providers. Just make sure it supports the OS on your NAS. Any of them that claim to be unlimited will not truly be unlimited.