After starting Tails and connecting to Tor, *Tails Upgrader* automatically checks if upgrades are available and then proposes you to upgrade your USB stick. The upgrades are checked for and downloaded through Tor.
<p>If you cannot upgrade at startup (for example, if you have no network connection by then), you can start <i>Tails Upgrader</i> later by opening a terminal and executing the following command:</p>
<p>We estimated that, to actually reduce the overall download size, it's only worth it to do 1 manual upgrade every year if you apply all upgrades of Tails.</p>