code: public static String formatBytes(long bytes) {
  
  		double value = bytes;
  		String unit = "B";
  
  		if (bytes >= 1024) {
  			int exponent = (int) (Math.log(bytes) / Math.log(1024));
  			exponent = Math.min(exponent, 4);
  			switch (exponent) {
  			case 1:
  				unit = "KB";
  				break;
  			case 2:
  				unit = "MB";
  				break;
  			case 3:
  				unit = "GB";
  				break;
  			case 4:
  				unit = "TB";
  				break;
  			}
  			value = bytes / Math.pow(1024, exponent);
  		}
  
  		DecimalFormat df = new DecimalFormat("#.##");
  		return df.format(value) + " " + unit;
  	}
docs: Format the bytes into readable text
  
  @param bytes
  bytes
  @return bytes text