Last week, it was revealed that in PlayStation 4 software update 4.50, Sony would finally allow the use of external HDD. As people get invited into the beta, more is being revealed about exactly how the functionality works.
We now know that you can only use one external hard drive with each PS4 system. It’s also been revealed that removing your HD from your PS4 will mean that you have to repair your hard drive.
The Xbox One supports multiple external hard drives and is quite seamless in allowing you to move apps between internal and external storage.