Java tutorial
//package com.java2s; //License from project: Apache License import android.os.Environment; import android.os.StatFs; public class Main { public static int freeSpaceOnSDMB() { StatFs stat = new StatFs(Environment.getExternalStorageDirectory().getPath()); double sdFreeMB = ((double) stat.getAvailableBlocksLong() * (double) stat.getBlockSizeLong()) / 1024 * 1024; return (int) sdFreeMB; } public static String getExternalStorageDirectory() { return Environment.getExternalStorageDirectory().getAbsolutePath(); } }