When run for the first time, orafter [[deleting a previous Persistent Storage|delete]], an assistant allows you to create a Persistent Storage in the free space left on the USB stick.
<p>If you get the error message<i>Sorry, impossible to create a Persistent Storage on this device</i>, you need to follow our instructions on [[installing Tails on a USB stick|install]].</p>
<p>If you receive the error message while running Tails using <i>virt-manager</i>, then you need to [[run Tails from our USB image|doc/advanced_topics/virtualization/virt-manager#usb_image]] instead of our ISO image.</p>
<p>We recommend choosing a long passphrase made of 5 to 7 random words. <a href="https://theintercept.com/2015/03/26/passphrases-can-memorize-attackers-cant-guess/">Learn about the maths behind memorizable and secure passphrases.</a></p>
<p>To help you remember your passphrase, you can write it on a piece of paper, store it in your wallet for a few days, and destroy it once you know it well.</p> </div>
