The use of a persistent volume in a system which is designed to provide
anonymity and leave no trace is a complicated issue.
Read carefully the warning section.
When starting Tails, in the Use persistence? dialog of Tails Greeter, choose Yes to enable the persistent volume for the current working session.
Enter the passphrase of the persistent volume in the Passphrase text box.
If you select the Read-Only check box, the content of persistent volume will be available and you will be able to modify it but the changes will not be saved.
To open the Persistent folder and access your personal files and working documents, choose .
For advanced users, to access the internal content of the persistent volume choose live ▸ persistence ▸ TailsData_unlocked., and open the folders