Export.image.toDrive({
  image: medianpixelsclipped.select( "B2" ), //to add more band, insert ","
  description: 'S2_Cal_b2',
  scale: 10, // pixel resolution in meters
  maxPixels: 1e12, //set maximum number of pixels to be exported (is intended to prevent very large exports from inadvertently being created)
  crs: 'EPSG:3857', //set the CRS
  region: geometry
});