Experts in the field claim that the writings found in Sumer were much older then anything that’s ever been written in the Bible. Another think to consider is if Moses was alive around 1500 BCE then what language did he write his writings in because the form of Hebrew used wasn’t around yet. Also did Moses travel to Sumer because most of the stories found in Genesis were found there but none mention a god Jehovah.
Its also interesting that Moses was born then put into a basket and floated down a river yet this had already been done by Sargon’s mother and another woman in India with her son.