I downloaded Sentinel-2 data. This data have 13 files one for each band as jp2 format. I am reading this images the writing them as GeoTIFF format on python using rasterio. These images are large so I am applying lossless compression to them. I tried both 'deflate' and 'lzw'. I noticed that when I write a single band the image size reduces significantly (the compressed image is 40% the original image). However, when I write a multiple band image, the image does not reduce and in some cases it increases. Can anyone tell me why is that. Below is how I write the images compressed.
new_dataset11= rio.open( 'image_multiband_2A/new_multi11.tif', 'w', driver='GTiff', width=band_width, height=band_height, count=len(R10m), crs=band_current.crs, transform=band_current.transform, dtype=band_np.dtype, nodata=0, blockxsize=block_size_width, blockysize=block_size_height, tiled=True, compress='lzw')