During it's initial release last month, the system update 3.15 for Sony’s PlayStation 3 console was an optional download. But now things have changed, it's not optional anymore. To be exact, it’s compulsory.
So, even if you do not have any use for the features contained in this update, you still need to download it, period. God save you if you don't download this update.
Now, once you have downloaded the system update 3.15, you would be able to play PSP minis games on the big screen, and transfer saved data between PS3 consoles, ensuring all your existing content is safe. You can click here to read more about it – happy enforced downloading!