Is the story told in the book of Exodus a true historical event?
The Bible should be understood as a spiritual text. While it may be based loosely on things that happened historically, the stories it tells about those events will be changed in order to more accurately portray the spiritual archetypes the events are being used to represent.
Therefore, if you’re looking for historical evidence in the physical world to confirm the stories in the Bible, you will be disappointed because you are looking in the wrong world. The Bible is
not meant to educate us about the physical world. There are plenty of other, better sources for that.
That said, there may be
some historical evidence for Exodus. Consider this article about the possible discovery of the historical Moses:
Senenmut was a commoner adopted by the daughter of the Pharaoh, Hatshepsut, and treated like Egyptian royalty (which was completely unheard of at the time). He lived around the time Moses was expected to live. Although he had a tomb built, he was never buried in Egypt (ostensibly because he left with the Jews). And the Egyptians attempted to erase every trace of the memory of both him
and his adopted mother as a punishment right around the time the Exodus would have taken place.
So
something happened in Egypt around that time that caused the Pharaoh to want to erase all memories of Hatshepsut 30 years after she had been honorably buried. Did all of the historical details coincide with Exodus? Probably not, and we shouldn’t expect them to. But there do appear to be at least some loose historical correlations.