True firmware downgrading (reverting to a lower system version) is not achieved through a "magic" file. Instead, it relies on a process called Firmware Reversion Dual Slots
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The only proven way to return to a lower firmware is a highly technical process called . This is not a "downgrade" to any version you want; it only allows you to switch back to the one previous version that was installed on your console. Requirements for Reversion: True firmware downgrading (reverting to a lower system
Downgrading a PS4 is a complex , not a software one. It is officially known as "reverting" because the PS4 motherboard typically stores only two firmware versions: the current active one and the previous inactive one. To successfully revert, you generally need: Requirements for Reversion: Downgrading a PS4 is a