PS3 - Unable to dump flash memory to USB with bgtoolset

I have a stock 4.88 OFW 2000B system. I

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USB flash/external drive not showing on PS3

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Furever.me bgtoolset says my console is at 4.88, but actually Im at 4.89is it safe to proceed? : r/ps3homebrew

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ps3toolset flash memory patch won't download : r/ps3hacks

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Validating flash dumps - PS3 Developer wiki

OLD] How to Jailbreak Your PS3 on Firmware 4.87 or Lower!