Does the Xbox 360 Come with a Hard Drive? (Depends on Model)
That depends on the specific model of Xbox 360 you're referring to.
Original Xbox 360 (2005): These came with a 20 GB hard drive as standard.
Xbox 360 Slim (2010): The standard model of the Slim came with a 250 GB hard drive. There was also a 4GB model available, which had no internal hard drive.
Xbox 360 E (2013): This model was only available with 4GB internal flash memory, essentially making it hard drive-less.
Therefore, it's impossible to give a definitive answer without knowing which Xbox 360 model you're referring to.