Exit Zen
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<p>Your Persistent Storage will be preserved by both automatic and
manual upgrades.</p>
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<h1 id="check-version">Checking which version of Tails you are currently running</h1>
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- A Tails USB stick
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<h2 id="troubleshooting">Troubleshooting</h2>
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- If an error occurs while checking for available upgrades:
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- If an error occurs while download the upgrade:
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- If an error occurs while installing the upgrade:
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If your Tails USB stick fails to start after an automatic upgrade, see below how to do a manual upgrade.
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<h2 id="reduce">Reducing the size of the download</h2>
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When doing automatic upgrades, the size of the download increases over time.
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You can reduce the size of the download of future automatic upgrades by doing a [[manual upgrade|upgrade#manual]] to the latest version.
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Your Tails USB stick stores:
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1 **base** version that you first installed or to which you last did a manual upgrade
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1 **upgrade** package containing all the changes made to Tails since the base version
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For example, if you install a Tails USB stick with 4.6, the base version is 4.6, and:
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- The upgrade to 4.7 is 181 MB.
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- The upgrade to 4.8 is 347 MB.
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- The upgrade to 4.9 is 418 MB.
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But if you do a manual upgrade of the same USB stick from 4.7 to 4.8, the base version becomes 4.8, and then:
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The upgrade to 4.9 is only 205 MB, instead of 418 MB when 4.6 was the base version.
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