💾SDVirtualRAM – Use Your SD Card as Virtual RAM on Arduino

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8

3 includes are missing

#include "SDVirtualRAM_I2CSlave.h"
#include "crc16.h"
#include "SHA1.h"

Your ONE (should be several more?) example has nothing to do with ythe library in the loop section

void loop() {
  // Blinky status
  if (millis() - blinkTimer > 1000) {
    ledState = !ledState;
    digitalWrite(LED_STATUS, ledState);
    blinkTimer = millis();
  }
}

Your example appears to demonstrate the format method only.