If you specifically need version 4.89 (for example, for certain homebrew or restoration projects), you must use a third-party archive, as Sony's site only hosts the latest version. Format a USB drive to FAT32 .
For those maintaining a standard, "Official Firmware" (OFW) system, Update 4.89 is essential for accessing the PlayStation Network and the PlayStation Store. While Sony has signaled the end of the PS3 era by closing the digital storefronts on the web and mobile, the on-console store remains functional. Accessing this library requires the latest firmware, ensuring that legitimate purchases can still be downloaded and games can be played online (for the few servers that remain active). ps3 system software update 489 download link
Sony only provides the latest version on its official website. PlayStation Key Features of Update 4.89 If you specifically need version 4