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This comment was based on hard-won experience.
Once upon a time I spent a couple days writing an app to compute some values and the math wouldn't come out the way I thought it should. I fired up Excel to test the calculations and in less than an hour I had verified them plus calculated the values I needed  .
Software Zen: delete this;
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Researchers demonstrate 3D nanoscale optical disk memory with petabit capacity[^]
Yes, you heard that right: petabit - 100+ terabyte CDs. High density, low power, long life.
And this is a prototype - so expect production to be closer to petabyte if it ever gets there. 
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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This is a remarkable achievement, but the big issues here are access speed, reliability, retention period, and cost. For example, we already know how to encode data in much higher densities as DNA bases (2bits/base), but the access speed and cost make this impractical as a data storage method.
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
-- 6079 Smith W.
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I'd rather petacat.
I'd lose my files in something so vast.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
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You can pet mine if you want - just don't rub his tummy. 
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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You sound like you're saying 640 terabytes is enough for anyone. 
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heh.
maybe one day it won't be. But right now, to fill that would mean a sea of files I'd never be able to navigate in one lifetime.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
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A few decades ago one of my old friends was evaluating a new storage technology for all the x-ray images and a couple dozen other digital high-resolution image formats. Essentially it consisted of the 'foil' of CD-ROMs, but on a flexible substrate, cut to tape half an inch wide, and wound up on a reel, 3600 feet per reel.
The capacity was enormous - this university hospital, among the bigger ones in Norway, estimated that they could store all their images on a single tape reel a year - maybe two, if the future brought other kinds of imaging equipment. They estimated that all of Western Europe might need maybe a hundred reels a year. Maybe a few hundred reels.
This is the reason why they rejected the technology: The capacity was too high. No manufacturer will keep up a production of a few hundred rolls of tape a year - maybe a thousand, for the entire world. A million? Probably not. Ten million? Maybe. But a few hundred: No, absolutely no.
They were right: The technology never made it past the demo stage.
Religious freedom is the freedom to say that two plus two make five.
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It's estimated that ignoring physical data (books, papers, ...) we as a planet currently store over 60 zettabytes (1 billion terabytes), and that 90% of that data was created in the last two years. And apparently, the volume of data in the world doubles in size every two years.
Back in 2008, Google alone was processing 20 petabytes a day. Throw in Farcebok, tiktok, twatter, and the cloud and gawd know how much is processed today.
The important thing to remember is that data expands to fill available space (plus 10%) 
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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OriginalGriff wrote: data expands to fill available space (plus 10%)
Dark Data! The next bleeding edge field of study!
"the debugger doesn't tell me anything because this code compiles just fine" - random QA comment
"Facebook is where you tell lies to your friends. Twitter is where you tell the truth to strangers." - chriselst
"I don't drink any more... then again, I don't drink any less." - Mike Mullikins uncle
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jeron1 wrote: Dark Data
Latest theory: Dark Matter is made of the diskettes spewed all over the Universe by AOL Intergalactic.
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
-- 6079 Smith W.
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>64
It’s weird being the same age as old people. Live every day like it is your last; one day, it will be.
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And if we distill the data to valuable information, we probably require less than 1 petabyte of storage per annum. The rest is Tik-Tik videos, Cat videos, repetitive films (all with the same theme), junk data, and assorted babble.
What a waste of hardware. 
(OTOH, selling the hardware enables my employer, Western Digital, to keep me employed, so it's not all loss...)
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
-- 6079 Smith W.
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How dare you tell me that videos and photos of Mr. Whiskers are not important
Hogan
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So much of it could be logical links to centralized CDNs, too.
Zillions of duplicates.
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Daniel Pfeffer wrote: What a waste of hardware.
I must admit that I contribute to that myself.
Just like I like to go to my bookshelf just looking at their backs, reading their titles and recalling the story (sometimes I pick the book from the shelf to re-read a chapter or passage) - I used to go to the library find good books but hated returning them - in a similar way, it gives me a good feeling to know that my favorite movies are available in my shelves. All my favorite music as well. Just seeing a CD cover can lighten my mood.
No streaming service bankruptcy can take away my access to books, music or movies. No censorship, no economic decision cleaning out the space to make room for more profitable pieces. And: It is nobody's business which books I read, at which times and how many times I re-read which parts of the book. Or watch a movie. Or listen to a piece of music.
I've got several terabytes of electronic information, several terabytes of printed information, practically all of it redundant. It could have been retrieved from elsewhere. But I want to have it available, here at my fingertips.
Religious freedom is the freedom to say that two plus two make five.
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trønderen wrote: I've got several terabytes of electronic information, several terabytes of printed information,
Presumably you mean that printed material is stored electronically rather than physically.
Following estimates that a terabyte would hold 1 million books. Probably not realistic to idly scan that number.
How many e-books can you put on a 1 TB hard drive? - Quora[^]
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OriginalGriff wrote: Throw in Farcebok, tiktok, twatter, and the cloud and gawd know how much is processed today
And the GDP of the US in 2022 was $25 trillion.
But much of that is not kept in bank accounts. And certainly not one bank account.
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Does very dense memory hardware have a greater risk of radiation damage?
Inquiring mind.
"A little time, a little trouble, your better day"
Badfinger
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If you have a CD/DVD damaged by ionizing radiation, you have much bigger problems than data loss...
Electronic storage (RAM), magnetic media (HDDs) or electron traps (SSDs) can definitely be affected by radiation, changing single bits in the memory. When dealing with physical pits (as in manufactured CD-ROMs/DVDs etc.) or chemical changes (as in CD-R/DVD-R etc.) on a larger scale - it's less likely.
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
-- 6079 Smith W.
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I've heard there's some sort of ambient environmental effect that degrades optical discs. I can't remember what the effect is - oxidation? UV? It's whatever.
But as I recall it is part of the reason that tape devices are still used for serious backups.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
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Disc rot - Wikipedia
Quote: Disc rot is the tendency of CD, DVD, or other optical discs to become unreadable because of chemical deterioration. The causes include oxidation of the reflective layer, reactions with contaminants, ultra-violet light damage, and de-bonding of the adhesive used to adhere the layers of the disc together.
The major source of ultra-violet in most people's environment is the Sun, so whether the damage is caused by heat (warping the CD/DVD) or by ultra-violet is probably a moot point. I have some 20+ year old CDs, properly stored, that are still perfectly readable. I expect that my DVD reader will die before these CDs will.
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
-- 6079 Smith W.
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Thanx Dan, you answered my question. I sort of suspected such, but was not sure.
"A little time, a little trouble, your better day"
Badfinger
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WOO HOO finally I can do a backup of my entire home network on a single disk!!!!
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I did that in the late 1980s, when I got my first CD burner!
(My entire home network consisted of a single PC in those days, but that was the normal situation.)
Religious freedom is the freedom to say that two plus two make five.
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