Help with reading data from csv in BangleJs2

Hello,

I am a student who is to new JS and recently got my hands on to bangleJS2. As part of our student project we are planning to acquire motion and heartrate data from bangleJS2.
The goal of the following code is to save outputs of accelerometer, magnetometer and heartrate sensor into a csv file. Due to storage limitation we are stopping it to record data when Flash is less than 0.75MB.

We want to record at least two days worth of data.

fileName = "rawData";
Bangle.setCompassPower(1);
var rawData = require("Storage").open(fileName+".csv", "a");
Bangle.setHRMPower(1);
var timePast = Date.now();
Bangle.on('HRM-raw', function(hrm) {
  var memory = require("Storage").getStats();
  var hrmRaw = [
    "HRM:",
    hrm.raw,
    hrm.filt,
    hrm.bpm,
    hrm.confidence
  ];
  var c = Bangle.getCompass();
  var a = Bangle.getAccel();
  //Data order in the csv
  //timestamp, accelerometer[x,y,z], magentometr [x, y, g, dx, dy, dz], hrm [raw, filter, bpm, confidence]
  if(Date.now()-timePast>100){
    if (memory > 750000)
    {
    //1000000 Bytes = 1 MB (in decimal)
rawData.write([Math.floor(Date.now()),a.x,a.y,a.z,c.x,c.y,c.z,c.dx,c.dy,c.dz,hrm.raw,hrm.filt,hrm.bpm,hrm.confidence].map((o)=>parseInt(o*1000)/1000).join(","));
  rawData.write("\n");
  timePast = Date.now();}
  else{
   g.drawString("Memory full", 50, 50)
  }}
});

When we are trying to call the data we are only retrieving only 550 rows of data, even though the csv is having more data, we aren't able to get more values
We are using the following code in our script to read data

//getting Data
var getData = require('Storage').read('rawData.csv\1');
var array = getData.split("\n");
Bluetooth.println("<data>\n"+array[d]+"\n</data>");
//Removing Data
require("Storage").erase('rawData.csv\1');
require("Storage").open("rawData.csv", "w");

Is there a way to read all the rows from the csv file to array and send using ''Bluetooth.print''?

Apologies for my clumsy code.
Thank you in advance.