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What do people use for a shelf-stable backup (lemmy.nz)

submitted 3 days ago by Dave@lemmy.nz to c/selfhosted@lemmy.world

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I have backups on a backup hard drive and also synced to B2, but I am thinking about backing up to some format to put in the cupboard.

The issue I see is that if I don't have a catastrophic failure and instead just accidentally delete some files one day while organising and don't realise, at some point the oldest backup state is removed and the files are gone.

The other thing is if I get hit by a bus and no one can work out how to decrypt a backup or whatever.

So I'm thinking of a plain old unencrypted copy of photos etc that anyone could find and use. Bonus points if I can just do a new CD or whatever each year with additions.

I have about 700GB of photos and videos which is the main content I'm concerned about. Do people use DVDs for this or is there something bigger? I am adding 60GB or more each year, would be nice to do one annual addition or something like that.

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[–] Dave@lemmy.nz 2 points 1 day ago* (last edited 1 day ago)

Seems the only M-Disc capable writer I can find locally is a portable USB-C connecting one, so if I go with it I'll probably just store it with the discs. In theory M-Disc is supposed to be resistant to the kinds of things that destroy regular CDs, but making a second copy does sound like a good idea. I could even store the second copy somewhere else (another house) to protect against fire. I have cloud backup but you never know what's going to happen over 50 years. Or if I die in the fire and no one knows I have the cloud backup.