S3 download file more than 2GB using nodejs

s3download.js

const fs = require("fs")
const s3 = require("aws-s3") // blabla

const totalSize = await getFileSize(file) // if this is more than 2147483638

logger.info("downloading huge file ... " + file)
const partSize = 547483640
const saveFilePath = "path_to_save.file"
const parts = Math.ceil(totalSize/partSize)
const writeStream = fs.createWriteStream(saveFilePath, {flags:'a'})
for(let i = 0; i < (parts-1); i++) {
  const endBytes = (i+1)*partSize > totalSize? totalSize : (i+1)*partSize
  params['Range'] = `bytes=${i*partSize}-${endBytes}`

  const {
    Body
  } = await s3.getObject(params).promise()
  writeStream.write(Body)
}
writeStream.end()