The Akasha is primarily known to contain a living documentation for everything that has happened, everything that is happening, and future possibilities that exist. This documentation is known as the Akashic Records. But the Akashic Records are only one spiritual tool within the Akasha. While they are invaluable for retrieving information, they are not the only tool known to help.
There is an Akashic Record for each life that has been created. Your soul has lived many lives and has access to each Book of Life or Akashic Record it has experienced.
So, the Akasha is the source vibration of God. Your Soul exists in the Akasha. One Akashic Record or Book of Life exists for each life your soul has lived. Your soul has lived many lives before you developed the ability to incarnate onto the Earth as a human being and you have access to each Akashic Record related to your soul's experiences.