Backport PS4 Games From 6.72 To 5.05 - Downgrade PKGs
New PS4 6.72 System Software Update Warning Firmware Problems - YouTube
New PS4 System Update 6.72 Live Now, Here's What It Does (It's Not Much) - GameSpot
Lapy on Twitter: "Easy PKG Extractor 1.05 (this app extracts or copy fpkg from the PS4 to a USB device, does not dump anything) * this is only for FW 6.72 !!!