void setup() {
Serial.begin(9600);
char file_name[7];
char name[]="Rec_";
byte file_number=255;
char file_num[3]="";


itoa(file_number,file_num, 10 );

strcat(file_name, name);
strcat(file_name, file_num);

Serial.print(file_name);

}

void loop() {
  // put your main code here, to run repeatedly:

}