warning: deprecated conversion from string constant to 'char*' [SOLVED]

Is there another way to do the same avoiding this complaint by the compiler?

Yes. You have a string constant. I'll be you can find it. You are passing that string constant (who's type is const char *) to a function that expects a char *.

  1. Make the string not const:
char whatToPrint[40];
strcpy(whatToPrint, "NTP Syncronization Success");

and print that:

LogSDCard(whatToPrint,0,26,0);
  1. Use a cast:
LogSDCard((char *)"NTP Syncronization Success",0,26,0);
  1. And this is best - Fix your function declaration:
bool LogSDCard(const char *logData, byte Start, byte Len, byte time)