I am exporting a LANDSAT image for Malawi, but the exported image is corrupted, which I really do not understand why. Any help is very much appreciated.

The link to the Code

https://code.earthengine.google.com/24db16ff4ecc2210f2f2c5e892204247

or here directly, this is my code for exporting the image

Export.image.toDrive({
  image: Malawi,
  description: '10_M',
  scale: 30,
  fileFormat: 'GeoTIFF',
  maxPixels: 120568920794 ,
  folder : '2010_Malawi'
}); 

and my code for constructing the image (just using the RGB bands)

var countries = ee.FeatureCollection('ft:1tdSwUL7MVpOauSgRzqVTOwdfy17KDbw-1d9omPw');
var Malawi = countries.filter(ee.Filter.eq('Country', 'Malawi')); 
var landsat = ee.ImageCollection('LANDSAT/LE07/C01/T1_SR');  

var Malawi = landsat
.filterBounds(Malawi)
.filterDate('2010-01-01', '2010-12-31')
.select(['B1', 'B2', 'B3'])
.median(); 

Many thanks,

Marion