Check whether the SD card is available or not programmatically

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}

Accepted answer doesn't work for me

Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);

In case if device has a built-in storage, it returns true;My solution is that to check the external files directory count, if there is more than one, device has sdcard. It works and I tested it for several devices.

public static boolean hasRealRemovableSdCard(Context context) {    return ContextCompat.getExternalFilesDirs(context, null).length >= 2;}

Use Environment.getExternalStorageState() as described in "Using the External Storage".

To get available space on external storage, use StatFs:

// do this only *after* you have checked external storage state:File extdir = Environment.getExternalStorageDirectory();File stats = new StatFs(extdir.getAbsolutePath());int availableBytes = stats.getAvailableBlocks() * stats.getBlockSize();