The latest PS3 system software is usually available here. Note that Sony often replaces older versions with the most current one (e.g., 4.93).
To ensure the PS3 recognizes the update, your USB drive must follow the exact naming convention below: ps3 system software update 489 download link
, primarily to enhance account security by requiring device passwords for sign-ins. Official Download & Installation The latest PS3 system software is usually available here
Below is the information regarding the download link, installation methods, and system changes. Official PS3 Update 4.89 Download Details ps3 system software update 489 download link
As with all updates, it provided improvements to system performance. PS3 System Software Update 4.89 Download Link
Always download official firmware directly from Sony servers to avoid malware or bricking your console.