With Thunder Save users of the popular email client email client backups create their mail and settings. In addition, the freeware the backed up data in case of a crash fairly straightforward restored. Since Thunder Save obtains its information from an INI file of the mail client, the Data Safe captures all data stored there. This refers not only the e-mails than those with one, but also settings for accounts and aliases. Advanced users also access manually in the INI file of Thunder Save and influence there, among others, the compression rate of backups. Guidance on the necessary commands for this can be found on the manufacturer's website.