Updating ps3 via storage device
Jailbreaking allows you to install mods, cheats, third-party applications, and games that you normally can't use on the PS3.
Highlight "Update via Storage Media," and press X again.
For whatever reason, you may want to install original firmware back onto your PS3, this could be due to a new game coming out with anti-cheat system.
On environmental grounds, I couldn’t be happier about the move to digital – but it means local storage needs are growing rapidly.
The days of having a slot-in memory cartridge are far gone – a few hundred gigabytes would be modest by today’s standards. Luckily, Sony made it really easy and user-serviceable to upgrade the internal storage drive – unlike Microsoft, who locked it down and demanded you buy first-party approved models only.
All you need to do to revert back is to install the original firmware from the playstation website.
Preparing to Jailbreak Creating the Jailbreak Drive on Windows Creating the Jailbreak Drive on Mac Jailbreaking the PS3Community Q&A This wiki How teaches you how to jailbreak a Play Station 3.