Terabyte Disk

The Terabyte Disk is an item that contains information related to the YUKIDOH Plan. While it is briefly mentioned, it plays an important role in perpetuating the Infinity Loop. It is held by Kusuda Yuni and travels in a loop, moving from 2012 to 2011 eternally .

## Description

According to the official timeline, the disk contains an encrypted sector which has all the important details regarding the execution of the YUKIDOH Plan. The real Yukidoh Satoru was able to decrypt these files . After setting up the events, he re-encrypts the files and returns it to Yuni's room in SPHIA .

On the other hand, the unencrypted sector is accessible to Utsumi and Yuni. According to Utsumi, the disk contains many text files filled with information only she would know, information about their current situation and prophesies spanning gigabytes . It contains enough truth to get Utsumi and Yuni to believe it with 100% certainty , but it also hides some information and contains deceit to influence the way characters behave.

## Information Written on the Disk

* Satoru's name (technically false, as it is Enomoto's body)
* Satoru and Kokoro are different personalities
* Satoru has Dissociative Identity Disorder (false)
* Satoru's relationship with Mayuzumi Lin
* Something that caused Utsumi to no longer by bothered by Satoru claiming to know Kokoro or Yomogi, and is no longer bothered by the avalanche . She says that they died in an avalanche, and explains that Satoru created the split personality to keep Mayuzumi alive in his memory . This is in the same scene where she tells Satoru not to believe her.
* Enough for her to stop suspecting why Yuni is in SPHIA
* "Kusuda Yuni exists to exist", meaning Yuni's actions ensure the disk loops so that he will exist as he does now.
* Things only Utsumi and Yuni could possibly know
* Prophesies, or events that will happen in the future
* A video related to the contents of the text files

The encrypted sector also has information on the following:

* Details about the space-time transfer device
* Possibly describes Enomoto Naoya's death due to the baby's colic
* Information about Self, [ORE] and the memory transplant

## Information Possibly Written on the Disk

* The disk may have told Utsumi to give Kokoro the sleeping pills. She disguises this by saying she's a psychiatrist . This claim also made her diagnosis of Satoru's DID more believable.

## Information Not Written on the Disk

When Utsumi reads the disk on the first day, it seems the unencrpyted sector is missing some information.

* The Yuni in SPHIA is the Yuni from 2011. After reading the contents of the disk, Utsumi finds it strange that Yuni in 2012 doesn't remember the plane crash from a year ago . That means the disk has no information about Yuni's time traveling.

## References

1. ↑ "In other words, that disk goes round and round between the years 2011 and 2012?", Satoru Chapter: Infinite History (Full Text)
2. ↑ Satoru analyzes the disk he had "inherited" from Yuni. It includes encrypted information, but Satoru successfully decrypts it. The disk indeed included various information —— "Information only the reader would know" or "All the information the reader wants to know" -- Chronology of Remember 11
3. ↑ Satoru "returns" the terabyte disk to Yuni's room in SPHIA. (Satoru re-encrypts any data he doesn't want other people to read) -- Chronology of Remember 11
4. ↑ "It's basically a collection of a huge amount of text files stored on the terabyte disk."— Utsumi, Satoru Chapter: Great Mother (Full Text)
5. ↑ 5.0 5.1 5.2 5.3 5.4 5.5 "The fact that Yukidoh-kun and Mayuzumi-san were once lovers. The fact that Yukidoh-kun has Dissociative Identity Disorder. As for the rest of it, I can call it nothing short of prophecy, spanning many gigabytes. Things that only I, or only Yuni, could possibly know were there, spelled out in black and white. Here and there, whoever made this was even courteous enough to attach a video pertaining to the content of the text...", Satoru Chapter: Great Mother (Full Text)
6. ↑ "But in any case, Utsumi trusted that "document" with 100% certainty.", Satoru Chapter: Great Mother (Full Text)
7. ↑ ""Yukidoh Satoru" and "Fuyukawa Kokoro" are different personalities..."— Yuni, Satoru Chapter: Trickster (Full Text)
8. ↑ ""Doesn't have memories of the time he becomes Kokoro"? What was Yuni trying to say? Why did he suddenly apologize? How does he know me? These mysteries and that terabyte disk... what on earth do they have to do with each other?"— Satoru, Satoru Chapter: Trickster (Full Text)
9. ↑ "It also seems that Utsumi knew I'd gone out with Lin thanks to a mysterious document...", Satoru Chapter: Great Mother (Full Text)
10. ↑ "Why did Utsumi act so calmly to that "me with DID" claiming to be "Fuyukawa Kokoro"? She clearly knew about Fuyukawa Kokoro being caught in the avalanche with her husband, Yomogi Seiji. When I tried to deceive her with the name of a person she knew, as a matter of course, you'd expect her to react with a healthy dose of repulsion or something. [...] However, she said it doesn't bother her anymore. Why is that so...?", Satoru Chapter: Great Mother (Full Text)
11. ↑ "Yukidoh-kun, deep within your heart, you still feel strongly for Mayuzumi-san. But she has long since left this world. She died on the 17th of January last year. It's painful to accept such a reality, so you try not to admit it... But inside yourself, the thought of bringing about a world where Mayuzumi-san is still alive, even if it was just within you, lives on. However, creating an image of her in your mind just won't do for you. Thus, your purpose isn't to conjure up such an image. But a false reality, so to speak, where it's a fact that "Mayuzumi-san is alive"... So, trying to be as logical and consistent as you could, you desperately tried to produce this world within your mind. To cheat yourself... to make it believable... You sought out and found a third personality. Not Mayuzumi-san, nor yourself. So who would you choose? ...Someone who could perhaps be able to change this sad reality. It would be easiest for you to take on the role of one of the other survivors who was caught in the avalanche. It didn't matter who."— Utsumi, Satoru Chapter: Great Mother (Full Text)
12. ↑ "I kept my guard up just in case he was plotting something. It's only natural, right? He's the only survivor of the plane crash. Who then suddenly shows up, just like that, in front of me. Me, a family member of one of the victims. For example, what if Yuni-kun had been transported to SPHIA as a patient, without me knowing...? Wouldn't that be strange? Wouldn't you normally think it's weird? But, you know what? That one document solved everything."— Utsumi, Satoru Chapter: Great Mother (Full Text)
13. ↑  Satoru completes his time-space transfer equipment based on the information in the terabyte disk, and makes major amendments to his "Plan:" -- Chronology of Remember 11
14. ↑ Next, he gives Yuni and Enomoto detailed directions. However, he intentionally hides some information (information he is afraid could bring hindrances to his "Plan.") -- Chronology of Remember 11
15. ↑  The fetuses' colic continues. When SPHIA transfers to the Hotarubi circle, 2012 Enomoto is murdered by the fetus. (The fetus's body is 2012 Enomoto's, Enomoto's murdered body is 2012 Satoru's). As a result, this is an unexpected turn of events. Or is it? -- Chronology of Remember 11
16. ↑ "Even though the memories of That Guy were transplanted into you, you understand nothing, even now..."— Real Yukidoh Satoru, Satoru Chapter: Apoptosis (Full Text)
17. ↑ "[Satoru]: Then, was it Kokoro who asked for them? She came to you, complaining of insomnia...
[Utsumi]: No, I was the one who offered them to her. After all, a lot happened yesterday, right? That's why I thought she'd be tired... And I thought she could do with a good night's rest... Well, it's one of the medications often prescribed for those displaying your symptoms, too. As a psychiatrist, I had to consider what medication would be most appropriate for you at the time...And that was Zegtamin..."— Utsumi, Satoru Chapter: Break-Time (Full Text)
18. ↑ "Yuni: Hey, hey. What are you two talking about?
Utsumi tilted her head in confusion. She gazed back at Yuni with a bewildered look.
 Utsumi: How strange...", Satoru Chapter: Great Mother (Full Text)