HFW-4.91.1-PS3UPDAT.PUP is a modified system update file for the PlayStation 3 console. It is not an official release from Sony Computer Entertainment. Instead, it is a "Hybrid Firmware" (HFW) developed by the PS3 homebrew community (specifically derived from the work of developers like Esc0rtd3w and others in the scene).
. This firmware acts as a bridge, allowing you to use official features while re-enabling browser exploits that Sony patched in newer versions. Requirements : Must be formatted to partition scheme. HFW-4.91.1-PS3UPDAT.PUP file you mentioned. Controller HFW-4.91.1-PS3UPDAT.PUP
: You must be on the latest firmware (or a spoofed version) to sign in to the Official PlayStation Store and play online. Blu-ray Compatibility HFW-4.91.1-PS3UPDAT.PUP
No. HFW remains on the NAND/NOR even after a full format. However, you will need to re-install HEN and any PKG files. HFW-4.91.1-PS3UPDAT.PUP
: Format a USB drive to FAT32 and create a folder structure: PS3 > UPDATE .