You need to redirect your PS4 to a server hosting the exploit files. The easiest method is using a custom DNS server:
: Access to an online or self-hosted PS4 exploit menu (such as Karo, AlAzif, or NightKing hosts). Step-by-Step: How to Write and Deploy exfathax.img Step 1: Flashing the Image to USB exfathaximg ps4 900 download exclusive