Java tutorial
//package com.java2s; import android.os.StatFs; public class Main { public static long calculateUsedDiskSpaceInBytes(String path) { StatFs statFs = new StatFs(path); long blockSizeBytes = (long) statFs.getBlockSize(); return (blockSizeBytes * ((long) statFs.getBlockCount())) - (blockSizeBytes * ((long) statFs.getAvailableBlocks())); } }