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Hello!! Some recent technical problems on my family’s NAS gave me a big scare and finally pushed me to figure out a way to back it all up. I’m asking here specifically because I really don’t know where to even starts because of the fact I’ve got just under 50 terabytes worth of data stored in a 7-disk RAID-5 and would prefer to keep it cheap. What are your suggestions?

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Cold storage solutions would be cheapest if you don’t need to access it often, if you do then Backblaze b2.

Lastly you could do your own backup (drives sitting at a friends of family’s place?)

My suggestion: Buy 3x 28TB drives. Mirror the data to them. Then move them off site.

The off-site location could either be a family member’s home where you can then sync to the drives over the internet. Or in a PO box nearby that you retrieve them from time to time to re-sync the data.

How much of that 50 terabytes is media downloaded from the Internet? Because the cheapest way would be to trust that it’s already backed up on the Internet and then use one of the usual services like B2 by Backblaze or Storagebox by Hetzner to back the rest of it up.

This is a good compromise. When I was tight on backup space, I just had a “backup” script that ran nightly and wrote all the media file names to a text file and pushed that to my backup.

It would mean tons of redownloading if my storage array failed, but it was preferable to spending hundreds of dollars I didn’t have on new hardware.

Yeah, if 90% of that is movies/shows, then you really don’t need a backup of that as you can always re-download it. Then you have a 5TB backup problem which is much cheaper to solve.