Java tutorial
//package com.java2s; import android.os.Environment; import android.os.StatFs; import java.io.File; public class Main { /** * get the space is left over on sdcard */ public static long getRealSizeOnSdcard() { File path = new File(Environment.getExternalStorageDirectory().getAbsolutePath()); StatFs stat = new StatFs(path.getPath()); long blockSize = stat.getBlockSize(); long availableBlocks = stat.getAvailableBlocks(); return availableBlocks * blockSize; } }