How to Send Float/Double over SPI Arduino (SAMD21 Based Board) - arduino

Question

I am trying to send a double/float over SPI from my SAMD21 based board, with chip select on pin A1/A2. I have copied some code from the internet, but I don't really understand it, plus it only works for sending data between two Arduino Unos. Here is my master:
#include <SPI.h>
float a = 3.14159;
float b = 2.252332;
uint8_t storage [12];
float buff[2] = {a, b};
void setup()
{
digitalWrite(SS, HIGH);
SPI.begin();
Serial.begin(9600);
SPI.setClockDivider(SPI_CLOCK_DIV8);
}
void loop()
{
digitalWrite(SS, LOW);
memcpy(storage, &buff, 8);
SPI.transfer(storage, sizeof storage ); //SPI library allows a user to
//transfer a whole array of bytes and you need to include the size of the
//array.
digitalWrite(SS, HIGH);
delay(1000);
}
And here is my slave:
#include <SPI.h>
byte storage [8];
volatile byte pos;
volatile boolean process;
float buff[2];
void setup()
{
pinMode(MISO,OUTPUT);
SPCR |= _BV(SPE);
SPCR |= _BV(SPIE);
pos = 0;
process = false;
Serial.begin(9600);
}
ISR(SPI_STC_vect)
{
byte gathered = SPDR;
if( pos < sizeof storage)
{
storage[pos++] = gathered;
}
else
process = true;
}
void loop()
{
if( process )
{
memcpy(buff,&storage,8);
Serial.print("This is val1:");Serial.println(buff[0], 5);
Serial.print("This is val2:");Serial.println(buff[1], 6);
storage[pos] = 0;
pos = 0;
process = false;
}
}
Any help would be aprreciated, and please understand that I am a newb in this subject.