Your PlayStation 3 is not connected to the internet? Here's how to update the firmware manually. You can download and transfer the update file (PS3UPDAT.PUP) using a compatible storage device such as Memory Stick, Memory Stick Duo, a USB key (FAT32) or PSP.
A USB key formatted in FAT32.
Create a PS3 folder at the root of your USB key.
Open the PS3 folder and create a UPDATE subfolder.