2 Answers

  1. Previous answers treat memory as a video with audio. Personally, I don't just remember video and sound.

    I have many tactile memories associated with various points on two square meters of my body's surface (sand kicked up by a gust of wind on a beach, for example). There is a muscle memory where I store both the position of the letter R on the keyboard of each of my computers, and data on how hard I squeezed my eyes when my mother turned on the light in the morning.

    There is a memory of smells that we do not know how to record on electronic media at all. Although I haven't played Quidditch for a long time, I have a large array of memories related to the vestibular apparatus. There is a memory of pain and memory of temperature conditions in various situations. There is an emotional memory that is poorly imitated in movies by changing the lighting and soundtrack.

    There is an unconscious memory, when a trigger (a flash, a phrase, a small room, a white coat) triggers a physical reaction (panic attack, sexual arousal, slowing heartbeat, tears), and then you can figure out for a long time why this person works this way, and not otherwise.

    There are dreams that I remember, and others that I have forgotten, but I will remember. The brain performs random combinatorial work every night with all the stored data. The results of this titanic work are also part of my “I”. They should also be saved.

    There is something that a person has forgotten. Forgetting doesn't always reduce the number of bytes. You don't just cut out whole pieces, but also drop out pieces of individual frames (see glitch art and Decasia).

    https://youtu.be/zLqN4eZE8Pk

    For example, a few years ago you saw a person hit by a car, but now you can't remember not only its license plate, but also what color it was and whether the person who was hit had a mustache. You even remember yesterday's fight with a friend differently than your friend remembers it.

    Every day we shoot such a “Rasemon” about ourselves, and it is not surprising that we have false memories, as well as memories cleverly concocted from what we remembered ourselves and from what we were told or shown in the photo.

    In addition, all these memories are intertwined with a network of links, tags, associations with each other, which are constantly changing and supplemented. Your life, like Dumbledore's, is not 100 years of continuous raw HD video. A GoPro in a person's forehead will record the GoPro's life, not the person's life. Your life is a “movie” that you have edited yourself a thousand times. Only in you are saved all the editing versions, all the defects, all the drafts, all the notes in the margins, all the duplicates, the entire Babylonian library named after you.

  2. If we assume that Dumbledore's memory is a compressed video recording of poor quality for all 116 years of his life, excluding sleep, then we get:

    1.5 mbit / s x 86400 (seconds per day) x 365.25 (days per year)� x 2/3 (awake, awake)� x 116 years / 8 (bits per byte ) = 457 terabytes.

    Probably, you need to add 20-30% of the volume for various service information and utilities, you will get a petabyte.

    And if� it needs a higher quality, then two petabytes.

    Humanity has learned to compress all other information well. In 1996, Brewster Cale (author of Alexa and Archive.org) I recorded the entire Library of Congress on a terabyte disk. So the rest� is pennies.

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