private static void verifyExternalStorageForExport() throws NoExternalStorageException {
if (!Environment.getExternalStorageDirectory().canWrite())
throw new NoExternalStorageException();
String exportDirectoryPath = getExportDirectoryPath();
File exportDirectory = new File(exportDirectoryPath);
if (!exportDirectory.exists())
exportDirectory.mkdir();
}
private static void verifyExternalStorageForImport() throws NoExternalStorageException {
if (!Environment.getExternalStorageDirectory().canRead() ||
!(new File(getExportDirectoryPath()).exists()))
throw new NoExternalStorageException();
}
private static void migrateFile(File from, File to) {
try {
if (from.exists()) {
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