Start GNOME Disk utility

1. Open GNOME Disk Utility from the menu Applications ▸ System Tools ▸ Disk Utility .

Find out the device of the persistent volume

Disk Utility lists all the current storage devices in the left pane of the window. When you select one of these devices, detailed information about it is displayed in the right pane: its partitions, its brand, its size, etc.

1. Find which device contains the persistent volume. It should have two partitions, one labelled Tails, and another one laballed TailsData which corresponds to the persistent volume.

2. In the right pane of the window, verify that the device corresponds to your device, its brand, its size, etc.

Change the passphrase of the persistent volume

1. In the right pane, select the persistent volume partition, labelled by clicking on it.

2. Click on Change Passphrase.

3. Type your current passphrase and then type twice a new one.

4. Finally click on Change passphrase.

5. You now can restart Tails and try to enable the persistent volume with its new passphrase.