IIRC you’d be near the 1.8MB range as about 200KB are used for the EEPROM emulation and LittleFS does not require (extra) wear leveling - but I’d rather leave the final word on that to Rick 
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IIRC you’d be near the 1.8MB range as about 200KB are used for the EEPROM emulation and LittleFS does not require (extra) wear leveling - but I’d rather leave the final word on that to Rick