We currently have an ps4 with external hard drive that we use to download games from PlayStation plus account. We have purchased an additional ps4 for our son with a 1tb memory so want to move his games across to this new ps4 from external hard drive. Is there a way to do it so he does not lose his progress and battle passes for Fortnight as I will be the next person he is likely to want to shoot (metaforically speaking) if I do. I have little or no understanding on how it all works so please simple instructions 
thank you
thank you