I have never purchased a more useless product than this. I guarantee that nothing you save is secure. II have spent two whole evenings trying to secure software. Only to find that when you you remove the disk and replace it you lose half of your files and can access the rest without security. The SanDisk is ok but do not trust the security it does not work. I could give it a zero rating or else i would. I challenge SanDisk with no hesitation to prove me wrong.