Check whether the SD card is available or not programmatically

by 
Boolean isSDPresent = android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);
Boolean isSDSupportedDevice = Environment.isExternalStorageRemovable();

if(isSDSupportedDevice && isSDPresent)
{
  // yes SD-card is present
}
else
{
 // Sorry
}

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