<li><p>If you leave the option <b>Clone the current Persistent Storage</b> deselected, the Persistent Storage of your Tails USB stick will be preserved when upgrading and the Persistent Storage of the other Tails will not be copied.</p></li>
<li><p>If you select the option <b>Clone the current Persistent Storage</b>, the Persistent Storage of the other Tails will also be copied when upgrading. You will lose all the data in your Persistent Storage, if you have one.</p></li>
To start the <span class="pc-clone mac-clone">installation, click on the <b>Install</b> button.</span><span class="upgrade">upgrade, click on the <b>Upgrade</b> button.</span>