Selfhosted

I use Kopia to backup all personal data (nextcloud, immich, configs, etc) daily to another disk in the same server and also to backblaze B2. Its not proper 321 but feels good enough. I dont backup downloadable content because its expensive

I have my BD/DVD/CD collection backed up to S3 Glacier. It’s incredibly cheap, offsite, and they worry about the infrastructure. The amount of Hard drive and infrastructure space you’ll need to back up nearly that amount will cost you the about the same give or take. Yes it’ll cost a bit in the event of a catastrophic restore, but if I have something happen at the house, at least I have an offsite backup.

I put the prndl in r and just goose it

I might be crazy but I have a 20TB WD Red Pro in a padded, water proof, locking, case that I take a full backup on and then drive it over to a family members 30m away once a month or so.

It's a full encrypted backup of all my important stuff in a relatively different geographic location.

All of my VM data backs up hourly to my NAS as well. Which then gets backed up onto the large drive monthly.

Monthly granularity isn't that good to be fair but it's better than nothing. I should probably back up the more important rapidly changing stuff online daily.

I've been using Borg and Hetzner Storage Box. There are some small VPS hosts that actually beat Hetzner's pricing but I have been happy with Hetzner so am staying there for now. With 24TB of data you could also look at Hetzner's SX64 dedicated server. It has a 6 core Ryzen cpu and 4x 16TB HDD's for 81 euro/month. You could set it up as RAID 10 which would give you around 29 TiB of usable storage, and then you also have a fairly beefy processor that you can use for transcoding and stuff like that. You don't want to seed from it since Hetzner is sticky about complaints that they might get.

Tape drives are too expensive unless you have 100s of TB of data, I think. Hard drives are too unreliable. If you leave one in a closet for a few years, there's a good chance it won't spin back up.

do you use a COW fs?, using snapshots could be helpful

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

6 acronyms in this thread; the most compressed thread commented on today has 10 acronyms.

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The software borgbackup does some insane compression.

It is more effective if you backup multiple machines tbh (my 3 linux computers with ~600gb used each get compressed down to a single ~350gb backup, because most of the files are the same programs and data over and over again)

But it might do a decent enough job in your case.

So one of the solutions might be getting a NAS and setting up borgbackup.

You could also get a second one and put it in your parents or best friends home for an offsite backup.

That way you don't have to buy as large of a drive capacity, but will only have fixed costst (+electricity) instead of ongoing costs for some rented server storage.

I guess that would be about 400$ per such a device, if you get a used office pc and buy new drives for it.

Tape seems to be about half the price per TB, but then you need special reader/writer for it, which are usually connected via SAS and are FUCKING EXPENSIVE (over 4000$ as far as I can see).

It only outscales HDDs in price after like ~600TB

I have just been using Borg with a Hetzner Storagebox as the target. That has the advantage of being off-site and not using up a lot of space since it deduplicates. It also encrypts the backup. It might take a while for the initial backup at 24TB though depending on your connection.

I backup my /home folder on my PC to my NAS using restic (used to use borg, but restic is more flexible). I backup somewhat important data to an external SSD on a weekly basis and very important data to cloud storage on a nightly basis. I don't backup my *arr media at all (unless you count the automated snapshots on my NAS), as it's not really important to me and can simply be redownloaded in most cases.

So I don't and wouldn't apply the 321 rule to all data as it's simply too expensive for the amount of data I have and it'd take months to upload with my non-fiber internet connection. But you should definitely apply it to data that's important to you.

Well, I'm just starting with serious backups, AFAIK you only need to backup the data which you can't replicate.

Low seeded torrents are just hard to get, but not impossible. Personal photos, your notes, any other files generated by you are the ones which need backups.

It depends on the value of the data. Can you afford to replace them? Is there anything priceless on there (family photos etc)? Will the time to replace them be worth it?

If its not super critical, raid might be good enough, as long as you have some redundancy. Otherwise, categorizing your data into critical/non-critical and back it up the critical stuff first?