The very first information storage tool?

The very first tool for storing information is ordinary human memory. There were times when there was still no modern technology or paper. Then people passed on all knowledge to each other orally in the form of stories, stories, legends. But it is natural for a person to forget the events that happened. And then people began to depict it all in the form of drawings on rocks and stones. These rock inscriptions and drawings have survived to this day. From them you can find out what information our ancestors had, what was very important for them in life, and what they wanted to pass on to their descendants. But, nevertheless, the very first tool for storing information was human memory.