Questionmark is right about papyrus in Egypt but we're talking about the very ancient material culture of Mesopotamia, whose scribes and artisans rarely used paper. They used clay. And in fact they wrote significant amounts of records, legal documents, accounts, and fables on clay tablets. On rarer occasions stone was used for inscribed monuments and annals. But it's the clay tablets that preserve almost all of the information we might think of as historical or scientific from the cultures of Mesopotamia.
The fringe's penchant for obsessing over cylinder seals only reveals the fringe's lack of understanding about the material culture of Mesopotamia. In the most extreme we have the wildly inaccurate ramblings of Zecharia Sitchin and in the least extreme, the many who for some reason believe Sitchin and others of his ilk were on to something. They were not.
Cylinder seals were basically property markers. It's that simple. They were not made to relay esoteric information. That might be the way fringies see cylinder seals today, but that's not how the ancient artisans themselves regarded cylinder seals.