<p>Your Persistent Storage will be preserved by both automatic and
manual upgrades.</p>

<h1 id="check-version">Checking which version of Tails you are currently running</h1>

To check which version of Tails you are currently running, choose **Apps&nbsp;▸ Tails&nbsp;▸ About Tails**.

Requirements:

<p>If you cannot upgrade at startup, you can open <i>Tails Upgrader</i>
later by choosing <b>Apps&nbsp;▸ Tails&nbsp;▸ About Tails</b> and clicking
<b>Check for Upgrades</b>.</p>

The automatic upgrade is impossible for technical reasons (not enough memory, not enough free space on the USB stick, and so on). For example, if you get the following error message:

The automatic upgrade failed and you need to repair a Tails USB stick.

<span class="hide">[[!toggle id="why_extra" text=""]]</span>
<p>It is currently impossible to manually upgrade a Tails USB stick
while running from itself. This scenario requires creating an
intermediary Tails on another USB stick, from which to upgrade your
Tails.</p>

[[Downloading and upgrading from macOS|upgrade/mac]] (more convenient)