saved.h

//This function will write a 4 byte (32bit) long to the eeprom at
//the specified address to address + 3.

void EEPROMWritelong(int address, long value)
  {
    //Decomposition from a long to 4 bytes by using bitshift.
    //One = Most significant -> Four = Least significant byte
    byte four = (value & 0xFF);
    byte three = ((value >> 8) & 0xFF);
    byte two = ((value >> 16) & 0xFF);
    byte one = ((value >> 24) & 0xFF);
    
    //Write the 4 bytes into the eeprom memory.
    EEPROM.write(address, four);
    EEPROM.write(address + 1, three);
    EEPROM.write(address + 2, two);
    EEPROM.write(address + 3, one);
  }

long EEPROMReadlong(long address)
  {
    //Read the 4 bytes from the eeprom memory.
    long four = EEPROM.read(address);
    long three = EEPROM.read(address + 1);
    long two = EEPROM.read(address + 2);
    long one = EEPROM.read(address + 3);
      
    //Return the recomposed long by using bitshift.
    return ((four << 0) & 0xFF) + ((three << 8) & 0xFFFF) + ((two << 16) & 0xFFFFFF) + ((one << 24) & 0xFFFFFFFF);
  }