PS3 System Update 4.91 Released and It Isn't Good News for Some
PS3 System Software 4.89 Update Live, Don't Update Your Firmware! | PSXHAX - PSXHACKS
PS3 received a new firmware update today (4.91 - This system software update improves system performance.) https://www.playstation.com/en-us/support/hardware/ps3/system-software/
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PS3 Update to System Software 4.89: Here's a Full Guide for You - MiniTool Partition Wizard
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PS3 Update to System Software 4.89: Here's a Full Guide for You - MiniTool Partition Wizard
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PlayStation 3 owners warned latest update might kill their console
Sony Releases PS3 System Update 4.91 For More Stability Improvements - PlayStation Universe
physical media - What is this PS3 System Software Update Disc? How it was made available? Are there more like this? - Arqade
How to Update a PlayStation 3
PS3 Update to System Software 4.89: Here's a Full Guide for You - MiniTool Partition Wizard