He was a corporal.
God did not create Satan. He created Lucifer as an angel. Lucifer exercised his free will and became Satan (The Adversary).
Please see the earlier posts -
With the full knowlefge of the consequences of His creating, He created entities without the necessary will power to keep from being seduced by "the dark side".
It's as if I design a car with bad brakes, them blame the car for not stopping.
Since God created the basic concepts of good and evil themselves, He knows exactly how evil operates. ( Exactly how HE wants it to operate)
Could God create good without creating evil ? Perhaps not, the concept of free will seems to need both good and bad.
But God is all-powerfull, surely He could make free will and good without being forced to create evil, so the creation of evil was a choice, something he required in the world.